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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Feb 2008 Posts: 207 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2008 Posts: 207 | does anybody know if truck 454 exhaust manifolds will fit in my '47 6400 with a big block | | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | For rough guesstimating you can check the gallery for AD trucks of any size (1/2 ton up to about 3 ton) with a transplanted 454. If someone got it to fit in a small truck you can probably do it too. The space between the frame and under the hood is essentially the same for these trucks big or small.
The best way to find you answer is probably just start trying to stuff the engine in there. I was in much the same situation as you are when I started my engine swap, I searched for advice and someone else who had done it. Lots of trial and error and try again and finally it fits.
Grigg | | | | | Joined: Jan 2008 Posts: 4,961 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,961 | Gonna be tough. Back in the early 60's I tried to put a 324 Olds into a 49 GMC and gave up. Not many projects I gave up on, but that was one of them. I think a 454 needs more room than a 324 Olds. | | | | | Joined: Feb 2008 Posts: 207 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2008 Posts: 207 | i have the engine in the truck but i don't have the manifolds/headers yet and was wondering what will fit before i buy something that wont fit. any suggestions? | | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | Can you borrow some from someone, even a junk yard? Or buy some with he understanding that you may bring them back for a refund, as you need to try them on first.
Grigg | | | | | Joined: Feb 2008 Posts: 207 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2008 Posts: 207 | the only junk yard around me doesn't allow returns but that was a good idea | | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | Ask around, a friend or neighbor may have some laying around you can try.
Try an ad on Craig's list, may find someone local who has some and will let you test fit before purchasing.
Get to know the guys at the junk yard, they can be your best friends. Around here all the yards I visit enjoy hearing and seeing my projects, are curious to see what I am into next, and are always willing to help, to trade stuff, or let me inspect and test something, so long as I return it unharmed, or buy it.
Often If I can describe what I am trying to do they can point me in the right direction, or recommend a part or component that should work better, or may fit, We'll go look in the yard, and I'll say, "like this one, but different here... one that does this..." and they can figure out just what to use. They can teach me things I would not have known on my own, or may not have seen or known where to look just looking around the yard by myself.
If they take an interest in your project you'll probably get a better deal on the parts you do buy.
Grigg | | |
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