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Going from memory. About 1974 installed Hooker headers on my 66 GTO. Also had issues with oil filter and starter. Other than they fit well on a 389 .060 over, 400 engine. Great headers. Had a 2:20:1 Muncie no issues.
In terms of basic instruction this is the best header install vid I have seen. I like that you make it clear that they almost certainly will not fit without mods, saves a lot of heartache for rookies I bet. And I like your methodical approach to the work, its satisfying to watch a guy who thinks while he works, so I subbed ya
First thing on a Pontiac, is find out if you are running round port or D port heads. You must match the correct header shape to the head. Second thing is check the heads to be positive the heads have all the bolt holes to put in all the bolts (some 326 and 350 engine heads do not have all the bolt holes). They will have to be drilled and tapped to avoid exhaust leaks. Third, be aware that some items may have to be moved of deleted. On my 74 SD-455 trans am the arm for auto transmission lock when the key was off, had to be deleted. The drivers side was very easy, the passenger side more difficult as I had AC on the car. I did have to remove the oil filter for installation, then run a short vs tall filter after installation. As Monte showed, you make have issues with the factory exhaust pipes lining up with the flanges of the headers. As a KISS guy myself, I ran header mufflers that came with flanges and then added turn downs in the rear. This made the exhaust system exit just in front of the rear axel. That way I did not have to deal with the power robbing sideways muffler on some firebirds and did not have to deal with tailpipe fitting over the axel. In my case, I have used Cyclone, Hedman, Doug Thorley street tubes, Doug's headers and Hooker headers. I have never had an issue with Hookers fitting properly.
You're a 💯👍I swapped engine's on my 79 El Camino. And the headers were a challenge. First hit chassis then the gearbox. I got a little frustrated 😠 and hammered the headers by gear box. And it fits now.🤣👌I give it to you bro. Very patient and great video👏
Hey my friend. I also have a 69 that I bought brand new. It's a Ram Air IV and I can tell you that when I went to put headers on it about 10 years ago, it had me in tears because of the poor fit. Had to relocate the proportioning valve, 2 lower control arm bolts had to be removed and installed the opposite way, and the 4th bolt back on each side is nothing less than impossible. Even on the lift and lifting the engine, the driver's side wouldn't go in no matter what. The left cylinder head had to come off to get the header to lay in the right place. Way too much work... and I spent my whole career in auto repair, so it's not a lack of experience. Admittedly, I bought the headers right after I bought the car and they sat in the box for decades, so the header technology is from 1969. They're Doug's headers which was the only thing available for round port heads way back then. They did have some plusses. Didn't have to remove the oil filter adapter and the filter can easily be removed. The back-drive column lock linkage still works. No problem with the clutch linkage. Caster/ camber adjustments will be a bit tricky but not impossible. All in all I will say this: Unless you seriously intend to race your car where you don't mind laying in the dirt to uncork the headers, then avoid these things like the plague. Buy the free flowing Ram Air exhaust manifolds and be happy with them. If you really need that extra 20-25 HP that headers give you, find it somewhere else in the engine and throw the headers in the trash. If I ever need to remove the heads again, the factory Ram Air IV exhaust manifolds are going back on. At this point in my life, I'm not crawling under the car to undo collectors. I'll use that energy to snap through the gears.
Hey Rich... I LOVE LOVE LOVE this story, and fully agree about getting to old to get under cars, ha, ha... that's why I have a lift now. Anyway, thanks for taking the time to comment, and I wish you well! Thanks again.
Oh to have a lift,was just laying on my back on concrete for 2 days detailing under my baby,,holy crap im getting old,,,grunts,cursing,hands and fingers hurt,,,,,but i will do again,love knowimg how sweet my ride is when done
I ran Hooker #4109 headers on my 79 400 4spd trans am. Headers fit perfect. No issues at all with the Z- bar or oil filter. No mods or dimpling of the header primary’s . But had another friend that had almost the same TA that I had. He had to ding some of the header tubes. We figured the headers were made on different jigs at the manufacturer. Who knows.
Hooker Headers worked well for me. 1972 Pontiac Ventura II, 350/TH2004R. Can change the oil filter without having to remove the filter housing. Since the oil filter does sit directly above the header, I just put a plastic bag over the header so the oil won't drip on to the header directly when the filter is removed.
In my first resto as well and although its a Ford Torino - your video gave me A LOT of well needed intel. Thanks a bunch! Keep the videos comin. Semper Fi
I’m dealing with this currently after my 495 stroker rebuild. Pain in the ***. 1971 Pontiac GT-37 with a 428 but now better. Doug’s headers and the old ones came out way easier then these new ones going in 🙄
This isn't criticism, it's 30+years of observation. A lot of fitment issues are not reading the install notes/instructions. The headers were built for a specific set of motor mounts and FRAME MOUNTS. I'm guilty of it too. After changing frame mounts on a 72 chevelle, headers that didn't fit, fit perfect.
Agreed about using stock motor mounts, etc... The "Manual" gearbox doesn't help either. As the headers have to clear the older style clutch Z bar, etc... Now that I have a hydraulic clutch, I might experiment with headers built for "automatics". Thanks!
My first set of headers was Headman, so on the oil filter side when I change the oil I just used to cover the header with plastic and spin off the filter. Little messy, but worked. My Doug's headers just came today so next week we going to see what it do.
@@FastMonty I found my header bolts that came with the Doug's headers they are a 1/4 of a inch longer the regular header bolts. Driver side went in easy I was finish in 15 min. The other side is giving me all the problems. My car is a '65 Le Mans , so I might have to trim the A-Arm bracket on this side or tilt the motor.
I like your explanation of headers fitting...yes it was challenging at every turn point. Here is my problem...Someone at hooker headers welded my collector upside down on the drivers side...which left the header stuffed up against the floor board...which requires removing/cutting and rewelding the collector to make it fit...the manifolds are now back on the car permanently...between having to modify my Z bar and rewelding the collector...it just wasn't worth the aggravation for an extra 15 hp.
Wow! That sounded more painful than my experience... and, I'd agree, that's a ton of work to get that extra 15hp. Good job though. Thanks for sharing your story!
I've had headers back in the day that fit perfectly, it does happen occasionally. Right now I'm putting some Fkowtech headers on a '82 chevy pickup with a 350.. They fit pretty good, but I'll be heating and bending the tubes to move the collector over and up a bit on both sides.
Hey Monte.that wrap will absolutely rot your header tubes as it holds the moisture n and n no time you start hearing exhaust leaks.ive seen it happen on two cars of my buddies. so please keep an eye on them and they do look good.Pete
I have a 69 gto as well and have headers. I use the same remflex gaskets on the headers and collectors. To make it easier and look cleaner i trimmed around each port so each one matches the head without xtra metal. I slotted one of the holes so it can be hung in place. I originally had hooker super comps and they hung low and bottomed out. I bought a set of dougs and i have d port heads. One side fit great one hit the frame. Sent them back had a set of mad dog headers made and ended up being for a grand prix. I ended up buying hooker super comps again and trimmed the ports and had then ceramic coated. They fit great although a bit low but not too bad. Headers on a pontiac are no joke and that center bolt is from hell but it's worth it in the end. I'm about to swap out my old torque tech 3 inch exhaust to a new pypes 3 inch stainless with x pipe and i have new pypes race pros.
Thanks Bane! Glad to hear we experienced the same pain... ha, ha... I love the tip about slotting the gasket holes, to drop them in. Thanks for sharing!
My impala was tagged 327,,,,and everytime i look at the driverside header,i change my mind to swap them out,ZZ502 IN IT AND ITS TIGHT RIGHT AT GEARBOX,POWER STEERING CONECTIONS,,,,NOT SURE I WILL HAVE THE RIGHT SKILLS TO COMPLETE THIS IN MY GARAGE,NO LIFT,NO WELDING EQUIP,,.......LIKE CLINT EASTWOOD SAID,,,,ONE HAS TO KNOW ONES LIMITATIONS,,,IM TOAST ,SO NOW I LOOK AT MY EXHAUST AND AM SO HAPPY WITH IT,LOL,ITS NICE AND ALL,WANTED TO PUT CHROME IN,,,,THE REST OF THE ENGINE BAY IS ALL TWEEKED OUT BEAUTIFUL,,,502 FINISHED LIKE A 454,ALL POLISHED ALUMINUM MARCH BRADKETS,PULLIES,CHROME POWERSTEERING PUMP,BRAKE BOOSTER, THE REST ALL SATIN BLACK WITH CHEVY ORANGE VALVE COVERS,YOU CAN EAT OFF IT,,,GREAT VIDEO,,YOU SAVED ME FROM DEFEAT,,I AM CAREFUL TO PICK AND CHOOSE MY BATTLES NOW.🏁🏁🏁🏁GREAT VIDEO
I have a 69 GTO with 455 d port heads iron. I put Hooker competition headers ceramic coated back in April of 2004 with copper gaskets. Been trouble free. I don't have to take entire assembly off to change oil filter. Can access filter as normal. Love your videos.
Thanks Craig! That's the exact feedback I love to see! Awesome info for others to learn from... hope to see more comments from you in the future. See you soon...
I bought a set of JBA stainless headers for my 67 Cougar 390GT. Im running into a lot of trimming of parts to get them to fit. Luckily i didnt have to go the route you had to.
I build my own header's, just built a Pontiac 468 using a pro mod block from All Pontiac, wedged it into 1969 firebird, needed header's with a minimum of 2 inch primary's. Fabed my own, 1969 firebird is very limited on header's.
Holy Moly,Awesome,,wish I had your skills,,much respect getting those bends right,,amazing,,I'm a great MAINTENANCE man,,,but when it comes to design,bending alignments,i see myself COMMITTING suicide......lol,,keep up the good work,,,,and I'm a firm believer that there is a trick to working on classics,which only COMES with experience,,I have met oldtimers that know and do things I cant BELIEVE go so well,how many times I went to do minor things that turned into a feakn project and a half
Monty’s Garage ! I appreciate your videos . I have a 65 Lemans has a 389 tri power now with ram air manifolds . I’m putting in a 74 Pontiac 455 - stroked and bored to a 468 with iron heads . I’m hoping the ram air manifolds will still work. I have th 400 and staying with it . I have trouble now with my starter getting hot 🥵 trying a hi torque mini starter to alleviate heat issue . Good luck with your project I’m excited to see it when completed. I’ll share my Lemans story from my old RU-vid channel 👍
Very cool, Levi! Just watched your build video, great job! Yeah, your ram air exhaust manifolds should fit fine, assuming they're the matching heads. The deck height of the 455 and 389 are identical, well, cuz they're the same block. Just different guts. I know your Hot Start issue all too well... I did a video on it. Here; ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SzAhvvH14po.html Keep up the great work!
Thanks Craig! Love the data points... I raised my engine up too, but that's because my power steering pump pulley was hitting my steering box. Yeah, another long ass story there. Ha, ha... thanks again!
With headers you get what you pay for. Buy a quality set of headers for your exact application and the install is pretty straightforward. Don't use the cheap gaskets they come with and use a quality fastener such as ARP. Header studs are great if your primary tube will allow them.
Great video, I’m here for tips on just removing my header on drivers side of my 69 Chevelle without pulling or tilting my big block engine. Sending them out to jet hot for coating. I enjoy this channel and also just subscribed.
Thanks Steven! Welcome to the channel... please share what headers you went with, and if any mods were necessary. (Just in case another 69 Velle owner stumbles across this comment) Thanks for the comment!
I installed a set of Hedman Hedders in my `70 GTO back in 1988, and they went in without any modifications. Had the original 400 with the original M40 automatic. Just lucky I guess!
Thanks Ray! I'm jealous! Ha, ha... so great to hear that there's hope for those of us still wanting headers to fit right. (Maybe due to the automatic???) Thanks for the comment!
Here you go... I'd recommend using a 2 Quart filter with this set up, not the 1 quart filter I used. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-wp3IcryoUBc.html
I'm headed this way with my 74 , 400 Catalina. Any suggestions for an applicable long tube set for this engine with turbo 400 , auto Trans, power steering and brakes. Love the Goat!!!! Had 69 from 70 til 74. Gained a family........ 4 kids, lost my favorite car
Ohhhh, bummer about losing your Goat. But, good reason. :) I'm not an expert on Catalina's, but, having an automatic will help with header selection. Manual's need a provision for the Z bar, etc... keep us posted as to what worked for your car, so others can learn. Thanks!
With great power comes great pain in ass cutting, massaging/sledgehammering,welding,gridding,bending,smashing,cussing,Patching bruises and cuts, emptying out bank account, realizing you fucked up more shit,That’s my world.
I’ve had headers once on a 71 Z/28 back in 1975. Never again due to hot floors and heat rising to the rolled down windows in the summer. My current Z is a 70 with a stock single Walker crossflow muffler. Plus I want to hear my Muncie M22 whine.
Thanks John... Yes, headers are almost not worth the battle. But, I will never surrender. Ha. ha.. I too would love to hear a Muncie M22 "Rock Crusher". Do not ever, ever, ever, let go of that transmission. Thanks for the comment... looking forward to hearing of more of your experiences, as it relates to other videos. See ya! Monty.
i feel your pain brother lots of work putting headers on a pontiac. I had to relocate my brake proportioning valve to get mine to fit lol I went with the summit racing headers on my 69 getting them in was a pain but i didn't have to do much to the headers to fit. they did hit the top of cross member of the frame pretty good so i had to get engine fame mount spacers to lift the engine and a few small dents where they hit but i didn't have to do any frame modifications and also spaced the transmission to correct driveshaft angle. the nice thing with these headers is I can remove the oil filter without removing the filter housing. overall not bad for the price and they lined up nicely with the pypes street pro exhaust only had to to cut a notch near the collector bend it up a little and weld it up on the driver side. But I can tell you this if the engine ever has to come out in the near future going to go with a ram air alum exhaust manifold and save me the headache lol
What header make and model headers did you use? I have a 69 GTO and just purchased a set of Doug's D590's and they look like they will hit the firewall on the passenger side. The motor is going in the car next week. Also, great video's and thanks.
I'm guessing you have aftermarket control arms which probably lowered the front end. I have never had any issues with Hooker Super Comps on any of my 1968-72 A-body headers. Personally, i would have never cut on the frame.
Totally agreed about not hacking the frame. I'll be fixing that hole when I yank the engine next year. Control arms have nothing to do with it... the problem is I had to shim the block higher due to the larger oil pan I'm using. Naturally that raises the headers, hence the issue. I'll check out those Hooker's Thanks!
I disagree about the variations from the original car they used for mockup. I believe manufacturers are just lie and say they will fit an application when they really don't. Hooker sent me 2 sets for my impala and both had the same issue. One tube was routed so far into the passenger tie rod it was almost on the other side of it. On 67 impala's the tie rods are routed behind the cross member under the engine. I had to cut the tube and completely reroute it. It was an all original matching numbers car. I could understand maybe having to put a dent in one in a tight spot from variations in a model. But the only way they could have designed the ones they sent me without having the same trouble I had was if they designed them without the front steering on the car.
my gto headers made the inside of the car so hot it was undriveable on a hot day here in Nor Cal, with header wrap be careful they dont get wet they will rust the pipe over time
If you do this for a living and owned ur own business....I would love to work for you and have you teach me your ways...I'm 23 and just bought a 72 gto and I just bought long tube headers before finding this video
Thanks Dylan... congrats on your purchase. I wish I could hire you, but I'm just an old dude in his home garage. ha, ha... Have fun, and ask questions if needed. See ya!
One thing to keep in mind is how many different motor mount combinations might exist for your makes of cars. Also for anyone running aftermarket heads, you are possibly multiplying fitment issues. I would not cut at or grind on the frame. I've had a hell of a time once on a A-body and after several different mounts found ones that worked. There is play in how the lower motor mount attaches to the frame as well to tilt things around . That's a pain in the ass , but a better solution to butchering things up .Raise the engine a tad or forwards or back a tad with motor mount adjustments. Last support the car as it carries the weight, and what I mean by that is cars bend and twist all around( more so if not true uni-body). I don't consider Camaros a true uni-body until the third generation for an example. Guess what ,when you do everything you can right (unless you have solid motor mounts ) its going to move around a lot running and driving aside from any added frame /sub frame flex. Drive some shaker cars, or just cut a hole in the hood for the air cleaner to stick out through and you will get my point. Based off the distance from the mounting point to the top of the air cleaner the movement is not the same, but exhaust mounts somewhere in the middle of that math equation.
project is under way. getting ready to order up a comp cam and gasket kit. Put headers under the tree for me and dad, engine is on the stand and beers are cold that is a huge gift for me. i will try to update when we go back in with everything. fitment is likely to be an issue a little. getting the old rusted ones off was no cake walk. 25lb sledge knocked them forward on the slotted center hole because we could not get them to turn with a wrench at all. planning to drill and tap our 7J2 heads for end bolts.
Thanks for the comment, Liam... And, thanks for the update. I can always promise two things... one, things never go as planned. :) Two, ice always ensures a cold beer. Keep at it! Looking forward to more progress reports... Monty.
68 GTO w/1973 pontiac 455, 6X d-port heads, 5 speed tremec. I used ceramic coated Hooker super comp 2 headers. Bolted right up with no clearance issues, but they were put in when the frame had no body on it, so it was easy. Rest of car has a dual 3" Torque Tech system with no crossover (This system is all coming out and being replaced with a new Pypes 2.5" and RA manifolds). Looks like the headers have to come out from below. I've been putting off this project for 6 mos. :(
Hey Monty, I may have missed it in the video, did you use Doug’s? I was REALLY wanting a set of TRY Y’s, but his business is NOT good shape…… can’t get them! So I guess it’s Doug’s on my 75 Formula! Thanks for the info!!
Ha! Ever install them in a Mopar? Christ....I have a 1970 Charger. Ma Mopar didn't do us ANY favors in terms of clearance. The right side is okay for big block cars. That is a nice thing because the left side is the worst that I have seen in any American car. There is the starter to deal with, the steering box, steering linkage, automatic cars have the cooler lines, shifter linkage AND transmission kickdown/downshift linkage ALL on the same side. 4 speed guys have the clutch linkage in the way there. Oh yeah...don't forget the torsion bars!
Thanks for the video! Helping me along with my header install on my Olds. Question - did you run into any issues with how close your headers are to your proportioning valve? I was going to move mine up close to the MC, but noticed you kept yours close to the headers. Any issues? Thank you!
Good question Rob... you mean the distribution block... no issues. But, nothing wrong with moving it away from heat. Which I might do, long term. Thanks for the comment, and good luck with those headers!
Good question David. You mean my diverted collectors? I don't think so... reason is, the flow of exhaust is not uniform, ie not constant, and they're only 45 degree curved bends. I remember seeing an episode on Power Nation, I think? Anyway, they dyno'd headers that were perfect and headers that had dents in it, you know, to fit around the frame... results were the same, because exhaust is in pulses, not constant. So, I'm pretty confident there isn't any loss. Hope that helps... thanks for the comment!
Good question Steven... Since my heads are ported, I use these oversize gaskets. (They work for stock D port too) butlerperformance.com/i-31643438-butler-d-port-header-gasket-2-120-x-1-540-large-port-fits-factory-and-aftermarket-set-2.html?ref=search:https%3A%2F%2Fbutlerperformance.com%2Fsearch.html%3Fq%3D%2BBPI-Gasket-Header-DP
Good channel man. You deserve way more subs. I am swapping a Pontiac 455 into a 77 Trans am that had the 403. It will also have a new TH350 transmission as well as a set of headers (not nearly as long as the ones in this video- more like run-of-the-mill Hooker headers (it’s not my car- I’m bailing a friend out of trouble he dug himself) anyway my question is: I am really tempted to bolt up the engine, transmission, and headers and attempt to drop the entire thing at once into the car using a cherry picker. Do you think it is possible or will I have to install the headers separately?
Thanks Brother... sounds like a fun monster you're helping build. To answer your question... I don't know? I find it hard to believe that you can install both assemblies, with the headers on. But, would love to know how it turns out! Let us know! Thanks again for the comment.
@@FastMonty I appreciate the honest comment my friend. in a world of “armchair experts” it’s refreshing to actually hear “I don’t know” rather than be sent down a rabbit hole. I am going to give it a try and will let you know either way so hopefully it helps you and others!! thanks again.
@@SchrodingersBox Ha! Yeah, I will never pretend to know anything, unless I've done it myself. I too have been lead down the wrong hole several times, and I've vowed never to do that to someone else. Can't wait to hear how it works out... as you said, it'll help others here too. Thanks again!
64 gto with a 400. First time I put a set of hookers on it three hours a special wrench and a ship load of sailor language they are on. Then the rear main leaked. Two hours more taking the headers off never again. Enter Doug's headers fit like a glove a standard 3/8 wrench reaches all the bolts.
Dude that built my 70' Nova SS W/ 383 STROKER, BEAT THE CRAP OUT BRAND NEW LONGTUBE HEADERS DRIVERS SIDE,..I WANTED TO KICK HIS ASS SO BAD,THE OLD ONES LOOKED BETTER LAUGH NOW,,NOT THEN😂
Interesting... can you expand on that comment? What's the issue, what's the work around, etc... that'll help others here, learn from your issue. Thanks!
I have a 68 Pontiac Firebird, 4 speed transmission I’m trying to install new headers and my gearbox is blocking. I bend those headers pipe and now I need to customize them.
hey Monty did you have to get a little longer headers bolts? I'm looking at the standard header bolts and like an inch long and with that thick flange on the Dougs might need inch and a quarter.....
@@FastMonty yeah I bought mine from Summit I don't recall seeing the bolts just the gaskets. Anyway I think I'm going to get some Black Chrome Molly don't want any rust.
I have a 75 trans am 400 D-port heads I'm using headman headers shorties and I'm having exhaust leaks everywhere and it's messing with my O2 sensor on my Fitech. I ordered remflex gaskets hopefully they resolve my problems. If not I'm going back to stock manifolds .
Thanks for sharing, David. I understand the frustration... I hope the Remflex gaskets solve the problem, because I too love headers. (I wish they had shorties for my car) Keep us posted!
Restoring a 68 Mustang FB, dealing with long headers (Hedman), putting in a custom z-bar, but in the process of mocking up exhaust for running the engine. I have to make sense out of the prior owner's purchase of exhaust tubing - nothing but butt connections and no way right now to attach to the header flange, Good tips here for sure. By the way - what's your camera setup and how do you like that Eagle compressor?
Inheriting someone else's work is never fun. But, the challenge is what makes it worth doing. My Eagle compressor is awesome. I've had it about 10 years. My camera is my cell phone. Crazy huh? Thanks for the comment!
I love when the best idea is the most obvious... ha, ha... probably because I got "wrapped up" in the idea to wrap the headers, because of the header topic. Next time I have the headers out, I'll wrap those lines too! Thanks!
Well guys Anyone who has had the misfortune of growing up Poncho and owning a Goat with A Pontiac motor knows full well what the header selection look like in the performance world you can go with Doug thoreys or Hookers or Headman but I'm going to 99% guarantee you will work for the end result but depending on your Cly heads that can make or break you ..
Dude you fed a whole bunch of people the wrong information.....all you had to do was stick 2 or 3 fender washers on each side on top of the motor mounts which would have raised the engine to gain your clearances that you beat in and grinded off. I've worked on 68-72 Pontiac A bodies all my life.
Thanks for the comment. But, no, that didn't work for me. (Because my engine is already shimmed by almost a 1/4") The point of the video is to expect Long Tube headers not to fit perfectly. There are too many variations between cars for a header manufacturer to make a "one sized fits all" header. Keep in mind, this is for my 69 GTO... I don't know about other years and models. As you can tell from the other comments... others struggled with it too. To your point, yes, there are lots of ways to change engine angle and position. The fun really started when I installed the Tremec TKO, that changed the engine angle dramatically.... so, there's that too. Thanks!
@@FastMonty you didn't do something right. As I said before I have worked on the 68-72 A bodies meaning 68-72 lemans and gto. Yeah I know headers are not one size fits all lol... something went wrong for you to have to beat your tubes in and grind on the frame....and no the TKO600 would not have played a role in that either, I have one....but anywho....this was last year
Throw those headers in the garbage and get Ram air manifolds, dyno proven to flow as well as headers. Unless you are building a race car. And you don't have any clearance issues and you won't have to butcher your car like that. Or disassemble for oil change or have leaks... the more you know... 69 Pontiac GTO The Judge.
IF U WANT A NICE HEADER GO DOUG'S HANDS DOWN USED THEM ON MY 68 GTO.. THE HOOKER HEADERS SUCK!!!! I went with hooker 1st and paid over 600 buck's on a d port.. They sucked went to a doug's headers went right on just had to drop oil filter on pass side..Then I got some edelbrock heads and had to buy round port headers and bought super comps did not fit got into a big argument with summit about it bcuz they wouldn't take them back hence the scratches bcuz it wouldn't fit.. Bought DOUG'S and bolted right up but had to drop oil filter and housing. If u have a fbody 67-9 firebird the headman headers fit pretty good part 1406. Been building Ponchos for a long time.. Trial n error.
Yup! Doug's fit best for me too. Not sure if you saw my remote oil filter video? Here it is, ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-wp3IcryoUBc.html if it gives you any ideas... great. Otherwise, thanks for your story, I'm sure it'll help others. Thanks!
1969 Lemans with Edelbrock Round Port Heads the 2” dougs headers fit horrible. The drivers side on mine was actually not bad it went right in. The passenger hit the frame and motor mount pretty solid. Lots of banging grinding and cussing. I wish I would have had this video last year. DO NOT BUY THE HEADERS ALREADY CERAMIC COATED. Waste of money you bang it off anyways. Oh and if you already have a custom exhaust already plan on having to modify it because the flanges will not line up at all.