427 cubic inches of Naturally Aspirated HP for Javelin Trans Am Tribute Build - Engine Power S7, E5 

The early trans am race cars where cubic inch limited. Grab a trans am rule book and build your tribute build car

Aaahh shoot... I was hoping for a really hot 360/401 buildup.

Should have kept it Pure AMC, would have been a great episode.

Keep your AMC all AMC!!!!!

I'm a g.m. guy but keep it stock with all of the original stuff it has . Killed the value

Pay and Tommy "will it do burnout?" Old AMC: shreds that shit!

Had me for 21 seconds....ls toss away engine. Great put that in the fire along with the foose e type and phantom works 56 thunderbird. RIP poor Javelin

All of these shows. Even ones on other networks don’t know how to leave good things alone.

My late mom had a '74 hornet 304 , I got her '68 cutlass 442 . She loved the " Horney Hornet " !

I've seen dyno tests of 390 and 401 engines making 570+ HP with ported iron heads on pump gas. If you know the ins and outs of the AMC v8, it can be done. Put on Eddy aluminum heads and get more compression on that pump gas.

I rarely give a video thumbs down, this one got it. If you want an LS, Camaros are dirt cheap.

I always enjoy an LS swap, but a built high compression aluminum head 401 would have been way cooler!

I'm a bit of a purist. I would have liked to see it stay AMC. See what could be accomplished with the existing motor. Maybe a turbo or some other type of power adder.

Going the easy way with a chevy motor, running a 1977 AMC 401 mild build in my 1949 Willys wagon, a real jeep motor in a real jeep.

I'm not an AMC fan at all but the javelin is a cool car. That car is in great original condition . I can't watch yall destroy it.

I'm still too old-school to put an LS engine in something like that

should have found a 401 to put in it.

Building a bulletproof 401 would have been a much better plan. Putting an LS into a Javelin is the layman's way out. With all the new equipment in your shop you wasted a great opportunity to show off using all that equipment and building a 401.

Since AMC was bought by Chrysler, I think it would've been more fitting/appropriate to put a 5.7 0r 6.6l hemi in it. Just my humble opinion.

So I’m very much a ls/lt guy, but the guys are right in the comments. For this build a 401 would have been the way to go. Like they said in the show, guys love these things or hate them. An ls swap just makes the lovers hate one of their own. And where did the 8500 ripums go? For one on a 401 that would have been legendary. If they got that to spin. (They got the cash) and for two on that motor it was only a cam and maybe springs(if they were not already good enough) away from 8500. Love this show, and a good ls. So not hating on it. But a amc would have been the way to go.

On the next Episode, watch as we replace the outdated engine in this 1962 Ferrari 250 GTO with this awesome tunnel ram crate motor with chrome valve covers. Of course we'll have to cut a big old hole in the hood, but that's progress.

Come on guys! Build a 401, please! There is tons of power potential there and I would love to see the numbers you come up with. You have got to be curious to find out, I am for sure.

I think they should have kept it AMC under the hood. That LS just ruined the whole classic Javelin vibe for me, thanks Power Nation .

Nacho's driving one of these on Better Call Saul. I dig it. 👍👍

I am out, when you went with a LS. But I guess we should not be surprised. Why not do a 390 or a 401. Na do the ease way out.

Loved these cars. But like many want to see someone do it all AMC..

New drinking game. Beer every time they say "billet"!!!

No 401 rebuild? What you thinking?

I’ll take one any day! I love the later Ramblers, Gremlins and Hornets, and the line of Javelins and AMX’s.

The most recent video appears to indicate that the original 304 rebuilt and Electronic fuel injection added (dyno'd to 330HP) is the engine they're planning on using now.

Wow a LS swap never seen that before.

Make American Motors great again!

Another destroyed piece of history!

Another LS build. Didn’t see that coming from here.

Missed the mark, this should have been a 401. You kept the Caddy and the PMD...

I agree with most of the constituents, a LS seems like a cop out. A hemi or a stroker 401 would be more appropriate. The LS is cool but not in every dang thing.

I'm a GM fanboy all day, every day. But the Javelin and AMX have always had a special place in my heart and will own one some day. While I love all the Powernation shows, they ruined this Javelin by putting a LS in it. AMC built lots of amazing engines that could have been put in this with aftermarket support. Even a Chrysler LA/Magnum engine would be closer.

Im a big fan of Pats. One of the BEST engine builders EVER. What a privilege it is for us when you share information. Thank you sir. Please don’t ever stop. My son and I would love an LSX built by you guys to drop into our 1986 IROC Camero. If you EVER want to do a show about a 427 LSX in an 86 IROC please give this vet and son the privilege of participation. Once again thank you both, especially you Pat!

Yes should have built a carbureted 401, Ls swaps are really getting to be lame.. Like a cop out..

Who doesn't love an AMC?

Waiting for the Ferrari or Porsche LS swap........ One of the last segments that haven't been LS'D out yet. GREAT BUILD - Would love to have that 427 with a FI system in a GM Disappointed that you chose to put it into an AMC. Like to see what you guys could do with a 360 -390 - 401. Bet you could make some BIG #s & the FAITHFUL would love to see it.

Another boring LS swap, let's get back to OEM motors that go with the car, it would be more gratifying to see them build a 600 horsepower AMC motor.

Oh wow an ls swap , ive never seen that before . Way to follow the mold guys.

bad idea with the ls motor . if you cant get 600 horsepower from a 401 call Barry Allen , he'll do it in his sleep .

Those are going in everything.

That Javelin is too nice and to few of them to be messed with..😭 on the flip side I'm glad they went with the non big-3 model...

MAYBE A LITTLE MORE...………......WHATS IT GOT STUNTMAN!!!!!!!

Always a pleasure to watch all these personable and knowledgeable guys. HA - and TOMMY's accent always makes me feel most welcome. But would have been a 'nicer' build using a BIG AMC engine - I am assuming one can purchase aftermarket heads etc for an AMC (forgive my ignorance) - but still going to be a nice driver even with a CHEV in it. I am not 'anti-LS' - but it is sort of like 'everyone' wants to drop a BARRA into something - in the end - the novelty of LS and BARRA into everything sort of wears off (albeit the BARRA not quite as numerous as LS swaps - yet - HA). Would have been a pleasure to watch an AMC being given the 'modern' stuff. Have a nice day all - stay safe. CHEERS from AUSTRALIA.

As much as I love Chevy engines, why did you not break from the norm and do a one off AMC engine. AMC engines were amazing and I would have loved to have seen one built.

LS LS LS So tired of LS swaps how about some good old power like a 401 and keep it a AMC

How cool would it have been to see a modernized 401? Port fuel injection, coil near plug, Holley brain. If they had to go modern platform a Gen III Hemi would have been much more acceptable.

"We wanted to be different." *LS swaps it* You literally can't get less different. Can't do it.

When they finally get a semi-rare classic and they can't keep it all AMC...I love Chevys but come on!!! 🙄😑

I still want a Javelin. Not with a Chevy or Ford engine though. Updated suspension is a definite as i like to hit the twisties. A turbo would be great . Gotta admit though, that the engine they chose is a sweet one.

Add me to the crowd that thinks you screwed up by not staying AMC. I didn't even bother finishing. I suppose I should've read the description and not wasted my time to begin with.

beautiful underrated car

Greetings for you from Iraq 🤗

This broke my heart. Finally an AMC, only to have my hopes crushed with another dumbass LS swap. Hell they could have done an episode where they rebuilt the straight six in a gremlin and it would have been cooler than this.

Pier Cardin edition AMC and Tommy Boshers FINALLY puts a part in his hair. So much style going on here..

It will sound wicked with long tube headers, and side exhausts. Like the Lou Gigliotti trans am corvette

The, LS is great! I, understand that. But, you guys, took the easy route!

Your new project looks great, should have went with AMC engine. Had a 1971 Javelin SST with the 360, swapped to a built 390 out of a 1970 Rebel Machine. Sold the car and really miss it. The Javelin you have deserves more respect, I like driving aggressively but you looked like you were trying to destroy the car.

Oh, man, an AMC 401 performance build would've been awesome! (But got it, Summit Racing, et al., make a whole lot more money on LS swaps ;)).

Always loved the Javelin.

What happened to the 8,500-9,000 rpm request. Just a bummer that it’s ANOTHER damn LS

I dont know why but I have always loved 427 engines. Ford or Chevy don't matter.

NO NO NO NO NO NO WHY WOULD YOU PUT AN LS IN IT INSTEAD OF BUILDING A 390 OR 401? OH WHY OH WHY?

I love the carb that makes it easy to tune

i thought it would have been cool if you put a modern hemi in the amc just because dodge bought amc later on so could have been a cool homage

I don't care what anybody else says, I love this crew of g00ns!

Man I tell you this show is motivation

That's it. Gonna do a pontiac 400 build for my pontiac.

Love the burn outs.

The reason they probably didn't build a AMC motor is they couldn't just order the parts on line. The volume just wasn't there for the aftermarket manufacturers to bother with much stuff. Cams are one thing. All you need there are master lobe profiles for grinding the am lobes (CNC cam grinders weren't even a gleam in Landis's* eye then). Heads and intake manifolds you are talking castings. Castings require patterns. Patterns before 3D printing came along were pretty labor intensive. The 390/401 blocks along with the Special Service blocks had heavier webbing on the mains to support 4 bolt main bearings on #2, 3, and 4. The 390 and 401 had forged cranks and rods. Forged cranks were also available on 360s iirc. I do know that the forged cranks were very hard on the production machinery. In actuality the nodular iron cranks are suitable for any street car you would want to live with. The stock dog leg heads flow very well out of the box. The major problem with the AMC V-8 (the 290 thru 401) is the oiling system really isn't up to sustained high RPM operation. The problem is the oil galley for the right hand side lifters also feeds the crankshaft bearings. This can lead to oil starvation problems on the rear end of the crankshaft and rod bearings. Note this is not an issue in normal vehicle operation. The gear set in the oil pump is actually longer than say a stock SBC. But because the pump is part of the front cover it makes an aftermarket upgrade a bigger problem. In 1970 Penske had engine problems with their Javelin motors due to oiling issues. In 71 and there after the Trans-Am series allowed dry sump systems. After that oiling issues were never an issue. Short deck aluminum blocks were cast for the Indy car program. These engines produced over 1000 HP and an AMC V-8 actually had the highest lap speed ever set by an Indy car for a number of years. Bobby Alison got caught using a roller cam in Nascar. But then every body else cheated to. There were also dealer install or parts counter parts that included some unusual pieces. Vented four wheel disc brake upgrades were available that were actually from Porsche.

Loved my javies, 68 base 343 4spd,, 70 sst hipo360 4spd,, even the 74 base 304 column shift automatic with all creature comforts cruiser type

Love the 4 barrels!

I am also a purist , I would have liked to have seen a 401 build. It is easy buying parts readily available off of the shelf but tweaking an old 401would be challenging and show skill and know how.

One guy " Let's make this AMC more powerful." Another guy " OK, Lets take the AMC out of it." Lame.

That's the way every build should start Hoonin in the parking lot !

Indy cylinder head makes aluminum blocks, aluminum heads,aluminum intake. Never heard of a GM AMC engine. Might as well be another Camaro. Bad Choice. Definitely a Tribute to Chevy not AMC.

lol the tucked in shirt, 1000 pens and the tape measure in the pocket.

Mad men, very cool, love it.

Would've been epic if you guys showed a little more skill by building a stroked 390 with some ported pro stock type heads and high compression tamed by a Holley or fast fuel injection system .ls. is no doubt cost effective big power more reliable but for this car to honor trans am racing its gotta be manufacture sppecific.

"They're gonna be ticked off that it has a carburetted intake, but look at my face, do I care?" quote of the year!

Nice wheels ! My dad had a car like this but his was midnight blue with black

I'm old school just like Pat. See that big honkin carburetor up thar........look at my face....do I care? LOL!!! 655 hp HELL YEA!

I’m not huge fan but that version is so cool. That interior is so 70s

Man that's a beautiful looking Javelin guys but maybe you could've swap a 392 Hemi in it vs another GM LS LS but hey a 655 HP out of an LSX427 is really impressive.

why tear down the engine, if it was good to begin with?

Awesome power

Awesome!!

That's by far, the coolest shifter for an automatic from factory

Respectfully, if you own the car and have your own vision do it. Damn the history or the market value, you own the damned thing. Wanna put a Cummins diesel in a Studebaker? Why not?

Hi, guys love your channel. If possible at some point in the future could you do a build on a 2000 Dodge Dakota R/T 5.9

Gee, back in 1968 a Javelin Funny Car was built with 438 Cubic inches of blown AMC, and all you can come up with is a belly button Chevy LS? This is no tribute! Cheap and uninspiring is all I have to say. I owned a new 1971 401 AMX and it was built trans am style. I bought it because it had the TA styling but not a 302 or 350 engine.

looking good

I love those old AMC's. There's not much from 62-72 I don't like

Vídeo fantástico 👏👏👏

That's a nice car. It's a shame to cobble it all up. I would leave it as it is.

would liek to see u guys do some overhead cam stuff