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swap 350 engine to 454 engine

Old 05-12-2017, 12:44 PM
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sylviac4321
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Default 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.
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Old 05-12-2017, 03:07 PM
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All kinds of info in this thread: https://www.corvetteforum.com/forums...me-please.html

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Old 05-12-2017, 03:13 PM
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John 65
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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.


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Old 05-12-2017, 05:08 PM
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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.
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Old 05-12-2017, 06:20 PM
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Do you need a short water pump?
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Old 05-12-2017, 06:24 PM
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Yes, the original BB vettes used a short pump.
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Old 05-12-2017, 06:25 PM
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Originally Posted by John 65 View Post
Yes, the original BB vettes used a short pump.
What's best to run long headers, short headers or stock manford
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Old 05-12-2017, 06:27 PM
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Originally Posted by sylviac4321 View Post
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.
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Old 05-12-2017, 06:31 PM
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Originally Posted by John 65 View Post
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.
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Old 05-12-2017, 06:34 PM
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Far from an expert but you're very welcome.
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Old 05-12-2017, 06:37 PM
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Originally Posted by John 65 View Post
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?
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Old 05-12-2017, 06:40 PM
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BB will fit with Oem master cylinder booster.
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Old 05-13-2017, 02:16 AM
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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.
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Old 05-14-2017, 09:32 PM
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Originally Posted by sylviac4321 View Post
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,
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Old 05-15-2017, 10:37 AM
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Originally Posted by sylviac4321 View Post
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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