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-   -   swap 350 engine to 454 engine (https://www.corvetteforum.com/forums/c3-general/3986641-swap-350-engine-to-454-engine.html)

sylviac4321 05-12-2017 12:44 PM

swap 350 engine to 454 engine
 
I have a 1977 corvette. I want to swap 350 engine to 454 engine. What pulleys and brackets will I need.

Jbster 05-12-2017 03:07 PM

All kinds of info in this thread: https://www.corvetteforum.com/forums...me-please.html

:rock:

John 65 05-12-2017 03:13 PM

I guess that depends if you want it to look like a big block Corvette engine or just want it to be functional, inexpensive and easy to work on? The correct style Corvette big block pulleys and brackets are not cheap.

I suggest you pick up a 68-74 AIM, it will show you exactly what parts are needed and how they get installed if you want the Corvette parts.

I put a 454 in my 77 also, correct looking parts were not an issue. Put the alternator on one side and the ps pump on the other. Good luck with your swap.:thumbs:


https://cimg0.ibsrv.net/gimg/www.cor...1d2384e788.jpg

69Vett 05-12-2017 05:08 PM

if your running power steering and A/C you almost have to use corvette specific BB.
brackets and pulleys, to make everything fit under the hood.
No Power steering, or A/C you can use almost any chevy brackets and pulleys.

sylviac4321 05-12-2017 06:20 PM

Do you need a short water pump?

John 65 05-12-2017 06:24 PM

Yes, the original BB vettes used a short pump.

sylviac4321 05-12-2017 06:25 PM


Originally Posted by John 65 (Post 1594726384)
Yes, the original BB vettes used a short pump.

What's best to run long headers, short headers or stock manford

John 65 05-12-2017 06:27 PM


Originally Posted by sylviac4321 (Post 1594726390)
What's best to run long headers, short headers or stock manford

I don't know what's best, but I stuck with the stock exhaust manifolds
and exhaust system.

sylviac4321 05-12-2017 06:31 PM


Originally Posted by John 65 (Post 1594726397)
I don't know what's best, but I stuck with the stock exhaust manifolds
and exhaust system.

Thank you, my friend is rebuilding his 1977 corvette. He wants to make sure he is purchasing the right parts. Again thanks for your expertise.

John 65 05-12-2017 06:34 PM

Far from an expert but you're very welcome.

sylviac4321 05-12-2017 06:37 PM


Originally Posted by John 65 (Post 1594726455)
Far from an expert but you're very welcome.

He has another question, do you have to change the break power booster to a smaller one?

69Vett 05-12-2017 06:40 PM

BB will fit with Oem master cylinder booster.

scrappy76 05-13-2017 02:16 AM

I did mine on a budget in my 76. you do not have to mess with the booster. Hedman headers fit just fine. I went with a short water pump and electric fan myself. I have both the p/s pump and alt on the left side and did it with aftermarket crank and water pump pulleys. the p/s pulley is a double pulley and the alt brackets were a b/b bracket on the bottom and the actual s/b bracket on the top, using a spacer at the head mount. Been running running this for a few years. The belts, I had to switch out a couple times till I got the right alignment and length.

Big Block Dave 05-14-2017 09:32 PM


Originally Posted by sylviac4321 (Post 1594726390)
What's best to run long headers, short headers or stock manford

Hooker sidepipes. They look and sound great, and make the car easier to work on from underneath,

Jbster 05-15-2017 10:37 AM


Originally Posted by sylviac4321 (Post 1594726473)
He has another question, do you have to change the break power booster to a smaller one?

On my engine, tall valve cover wouldn't clear the booster. Changed out the covers for stock height and used 2 gaskets to clear roller rockers and it cleared the booster fine.


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