Ol' Jimmy sure jumped to life with the new carburetor! If I get a chance (or can rope someone into filming), I'll see about getting some hauling footage sometime.
I’m not sure if you realized it, but at 15:34 a mouse emerges from the cowl wondering what you are doing to his truck. It’s nice to see an old truck get a new lease on life!
Jake , for what it is worth. Back in the day we called those stone filters and when the fuel became unleaded we would replace them with a paper filter. The old stone filter was great but would clog with sediment from the alcohol in the new fuel. From an old man , keep a spare filter in the glove box.
Good advice Russ... that I didn't know about! This truck has a paper cartridge fuel filter under the cab right out of the tank, then the inline one installed in the video before the stone filter. But with the "quality" of gas now a days... having a spare filter on hand is a must.
Love that truck! The circle track racers use those Holleys, can usually find them used for a pretty good price. They come in 500 and 350 cfm. Great video!
Jake, What year Buick V6 distributer did you use? Did you have to modify it to work? I have a 1961 GMC 4000 with a 305E and having issues and want to upgrade to HEI ignition. Thanks for any information.
It's so good when somebody sez that putting that carb on will do the job, and it does, isn't it? Looks good from here. There at about the 20:20 mark it was amazing to see how quickly that sign turned to GO ! LOL
Sure is! Beats making a $418 guess haha. Wasn't it!? Why the town put that dang stop sign up... to the left is just a narrow dirt fire trail that goes down into the woods.
I just bought a 79 GMC C-70 dump truck with a 366 for $1000. Bought it not running but it had a brand new Holley 600 cfm on it and the guy told me it was flooding since the day he installed it. I figured the carb was worth half of what I paid and the other half well worth scrap price. Interestingly enough what I found was a faulty O ring on the secondary needle and seat. Once I fixed that it fired right up and ran fine, just needs air screws adjusted now and same issue as you need to find an air filter housing that will work properly.
Good deal for a C70! And with a simple fix, you got a good dump truck out of it. Sometimes you get lucky like that buying stuff that turns out to be something easy to remedy.
A timing light, dwell meter, and a vacuum gauge, No dam computer needed , easy to work on ! duel exhaust would make her bark. Nice job Jake I love to see the young guys have a passion for the old iron,
And that's why I drive old trucks! Cheep to maintain, register and easy to work on... and if kept up, reliable as ever. Thanks Ed, wouldn't have it any other way.
Should be a 351E series as it had the smaller intake manifold. What throws me off is the Magnum series exhaust manifolds. Either way she's running like a champ!
Hmm, never knew those were magnum exhaust manifolds! Kinda figured someone messed with this engine years ago (and not for the better haha). There was a lot of blue RTV on stuff when I first got it... Thanks!
Hey! I have our Ole farm truck is a gmc 5000 w hoist it's been a wheat truck and the last 25yrs in our feed mill 478 v6 has been the best truck! His name is Jethrow. In Deer Park washington
I had a old GMC with the V6 but it was a 305CI not a 351 but the stromberg I had worked fine but when I got it I had to rebuild the thing because it was gummed right up and the idle ports were clogged right up and a bunch of other ports to were blocked so I cleaned it right up and it ran like a new truck and the carb never gave me a issue ever again. I ended up selling the truck but those V6 they have great torque and the way those trucks are geared they are great for towing
You may want to check the vacuum port you hooked the dist to. It is usually a manifold vacuum source instead of timed vacuum. The port on the metering block is where the dist should be attached to. For the air filter, you can use a filter from a mid 70s Olds Delta 88 in that housing & it will lift the lid up off of the bottom about an inch or so. You will most likely need to use a piece of all thread in the carb. It will be a fairly cheap & easy fix that will let in more air. You are correct about the torque those V6 engines produce. The truck should run very well for you now.
Some early 70's trucks used a spacer for the air cleaner. That would lift the filter unit you want to use up away from the carb. I think the spacer is about two inches tall if I recall correctly.
5tractorguy I have been following your videos on your 1961 GMC 5000 ever since you put out the first one years ago. I really enjoy watching the 1961 GMC 5000 since I have a 1961 GMC 1500 (3/4 ton) of my own. It is not often I see people preserving the bigger heavier duty trucks and I am glad to se that one has found a loving home.
Thanks Alex, sorry for the delay, been busy here... Yes! Many guys will part them out to use the cab on the pickups, downright shame. I really like the old heavy haulers, definitely worth keeping on the road.
good for you! funny as soon as you figured out that the air cleaner wouldn't fit, the very first thing I thought of using was the air cleaner spacer from a tbi truck too. cheers
Hey Jake nice job in the conversion Sounds great and obviously drives a lot better And when we get a chance in your free time lol We could see a first start on the bigger one Keep the videos coming
Thanks Scott. Ah the ol' 432! Gotta fire that thing up one of these days. Finally got a transport stand fabbed for it last year, so it can actually be moved haha.
Awesome Jake! Glad you finally got that truck all sorted out! It's such a great feeling to finally have some power again after so long without it, right!? I know when I finally fixed the carb on the Dodge and accidentally threw myself into the seat because I forgot how much power it was supposed to have after driving so long without it lol! My grandpa and I have been having similar issues to what you had with this truck with our model A for the last couple years and I finally convinced him to buy a brand new carb for it and with some tuning and timing adjustment we were just as happy as you were! That car finally seems like it's running right and has some power again! ( Well at least a lot closer to the whopping 40 HP it should have! 🤣) You should get some more driving footage when you get a chance! Seems like a lot of fun to drive! Looking forward to more content soon! : )
So nice to have that power now! It's amazing how much a good carburetor can wake an engine up, from the sounds of it your grandpa knows just what it's like! A little bit of tuning and maintenance goes a long way... Well, I'll have to commandeer my sister again to do some drive-by footage and ride along stuff. Need to update the clips in the intro lol.
I did the holley swap on my 1964 1/2 Ton with a 305E V6. It runs great the only issue I have is it is running way too rich. It came with size 73 jets so I put size 69 jets in it but its still a bit rich. Might try 68's or maybe 67's.
Damn, Jake, the truck really seems to be running great!! I wish that I had thought of it when you were down to bring my Simplicity back. It's working great,BTW. I think that I've got to go a little easier when I shift so that sort of thing doesn't happen again. I've got a Holley 600cfm or perhaps 650 Off Road Avenger that I had on my Ford for just a little while before I bought a similar Edelbrock unit. Way easier to adjust.... just two screws to dial in. The Holley leaked out of both fuel bowls right out of the box. They wouldn't believe me until they saw the video. They sent a replacement that did the same thing. I finally took it upon myself to change the primary and secondary bowl gaskets, and that finally fixed that issue. I could get that big 'ol truck up to 100mph 😬because the Holley could really dump fuel when it was wide open, but low speed fuel metering left a lot to be desired. Strangely, I swapped it onto the 360 on my CJ-7, and it worked fine. I took it off again later for some reason and the Edelbrock had been doing fine for years. The fuel delivery must be less for some reason on the Edelbrock because I can only get it to maybe 85 now. With the 4.88:1 gears, the engine is screaming around 4500 rpm, and the exhaust and tires are so loud that you and your passenger really need a headphone/microphone like in a helicopter to be able to talk to each other.
Glad to hear the Simplicity is back in action! Hopefully you can get some good use out of it this summer. That Holley must've poured gas in that Ford! You got a lot of tire and truck to move there, never mind if you have anything in the bed that needs to be moved. That brown '77 GMC I have had an Edelbrock, similar symptoms with what you mentioned. Seems to be jetted pretty lean, especially when hauling stuff, but I don't mind since I can get pretty good mileage out of it.
Love your old beastie she's a good looking truck.. I have a oil bath air filter for a Holley Teapot carb off of a Y block that would fit the new carb perfectly and looks almost the same as the original. Looks more period correct. 🤷♂️ It has a notch to clear both the distributor and the float adjustment. "Free" I would just like to see it used. Let me know. I can send a pic.
That would be appreciated Matthew... my cell number is pictured on the side of the service truck in the video, you can text that with a pic, or I can forward you an email if easier.
@@5Tractorguy Try as I might I am unable to read the script on the service truck. I even used my main TV. You can send me an E-mail to mbergin1958@gmail,com Replace the comma in the E-mail address for it to work. I will send a pic back. It is large, 17" in diameter and 7.5" high. I will test fit it on the 500 cfm carb on our Mustang stock car just to make sure it will fit. It is originally off of a Holley 2140 which as far as I know was Holley's first 4 barrel carb.
I know this is two years old now but I put a 401 in a 1965 4000 gmc and I used a caterpillar fuel filter for a 3406 for a spacer the meatal tube part 14:06
a "timed" vacuum port is one that pulls no air until the throttle is open. Most people and manufacturers used the ported/timed vacuum so you aren't getting the advance until you open the throttle. Right now at idle you're getting your base timing and the full vacuum advance at idle, then you hit the throttle and the vacuum drops. It's possible to run either way but it can be kind of a pain to get your off idle right with full vacuum advance.
Those BIG V6 GMC engines were quite TORQUE'E in the day!! you might want to check the valve clearance on it soon . Just keep up with regular oil changes with a real good quality oil brand and that old engine should be going a couple of human lifetimes from now!!! Good luck with the old girl!!!
Thanks John! It's due for an oil change I will say that haha... Been a good rig so far despite it's slow paced nature. But it'll haul anything ya put on the back!
When you hook the vacuum advance to manifold vacuum, it does the opposite of what you want. As you open the throttle, manifold vacuum DROPS, and you get LESS advance, not more.
I like that Truck Jake, ya done a Good job with the new Carb. it woke that ole V6 up, are ya looking into a paint job in the future? and what color, thanks for the video and hope to see ya again soon.
Thanks Mule. Some day it would be nice to get a coat of paint on and dress it up... I have to figure out what the JGR colors are going to be, probably some kind of darker blue (similar to interior of service truck cab), black and white.
Those V-6s will run forever if you take care of them, but none of them had anywhere close to good gas mileage. The carb you used is a Motorcraft replacement, so if you wanted an air cleaner that fit, you would have to get it off a Ford. The spacer works anyway. I am assuming that the light on in the dash is a charge light. The way that a charge light works is that it is supplied 12 volts at the bulb, and the ground runs to the alternator or generator. If the gen/alternator is working, it produces 12 volts on the ground line to the bulb - and since there is 12 volts on the supply and ground wire feeding the bulb, the bulb goes out because there is no voltage difference. If you want your charge light to go out, run the ground wire on the charge light to the #2 terminal on the alternator. This terminal powers up to 12v as soon as the engine is running.
With the old Stromberg I was pulling 7-8MPG. Haven't calculated with the new Holley yet and maybe it's best left unknown! That dash light is for the turn signal. For some reason, it stays on all the time on this truck, blinks when you move the lever to turn, but then remains lit. Doesn't bother me all that much so I haven't worried about getting it to work the opposite and shut off.
You did a Great job on the carb swap You can cut up that air cleaner and make it an open one I found a cheap under 20 bucks air cleaner on Amazon for my Holley on my pickup I was lucky I need a carburetor and had a Holley in the shed $ 30 dollars for a actual Holley gasket kit and I got a nice carb for cheap
That's a good deal for a carb swap! Good thing you had that Holley... I was thinking about buying a used core and rebuilding, but having a new carb with zero issues was more appealing, least in this case.
looks good keep it up can you help me out I have a 16hp cast iron Briggs and trying to figure out the ring gaps on it and I am lost thanks if you can and i have just post a video on whats going on with it
hey hey jake. wondering.. and i forgot what i did with ur CL ad info lol.. in the green mt state .. might be looking for comercial 430 gravely parts. trans and deck parts so on.. ????
Little late to comment response, been a busy year... if you still need the parts, look for the number in the side of my trucks in the videos or here's a link to the CL ad. (Don't want to post my contact directly on YT). worcester.craigslist.org/grd/d/boylston-older-tractor-engine-and/7405068856.html
Thanks Mike, I'll have to look. This riser has a breather tube I had to plug from the TBI system, would be good to get a regular one in the future though.
I noticed you put a Buick distributor in your GMC V6 Holly conversion. Are all Buick Distributors the same or is there a special one you got and do you know the part number?
That is a 1979 Buick Skylark 3.8L distributor. When I read into this conversion they apparently came in CW and CCW rotation (don't know if that's true). Got mine new from RockAuto here- www.rockauto.com/en/catalog/buick,1979,skylark,3.8l+231cid+v6,1023512,ignition,distributor,7108 You will need a bushing to mount it into the V6 too. A guy named Rod Johnson in WA makes them (he can be found on the 6066gmcclub forum). If you can't find his contact online, I can email it over to you.
Love the video. I would be worried that an air filter from a 16 hp motor wouldn't be enough for the carb and might make it run rich or otherwise hurt its performance
HA! That's probably the worst placed stop sign, why the town put it there... to the left is just a narrow dirt fire trail that goes down into the woods.
Correct. The GMC V6 has some unusual design aspects. Getting at the plugs is easy, and the wires are kept away from the exhaust heat. Downside is that crud tends to fall in the plug holes.
That's the turn signal light. For some reason, it stays lit when you aren't turning, but shuts off and blinks when you hit the signal lever. Not sure if it's the blinker module or something else... Sounds like a cool truck! Conventional cab I assume? I wish this one had a factory auxiliary, had to install mine.
@@5Tractorguy it was a 66 GMC tandem dump, it was one of fifteen, had front and rear floatation singles on it. Used it in coral gables Florida. Used it with my Bucyrus-Erie 30B series IV Superduty Dragline, digging ponds. ChiefD
Haha! I'm still alive! Thinking of doing an update video this weekend. Have some repair and startup material lined up too... Got a little over-booked with work this year is all.
@@5Tractorguy NO there's not. I've been to several overnighters years ago and it was usually me and one more that lasted all night. THEN go home and crash! Gopher it Jake and GBWYou!
