C3 General General C3 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

swap 350 engine to 454 engine

Thread Tools
 
Search this Thread
 
Old 05-12-2017, 12:44 PM
  #1  
sylviac4321
8th Gear
Thread Starter
 
sylviac4321's Avatar
 
Member Since: May 2017
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
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.
Old 05-12-2017, 03:07 PM
  #2  
Jbster
Le Mans Master
 
Jbster's Avatar
 
Member Since: Feb 2014
Location: hot 'lanta suburbs Georgia
Posts: 6,420
Received 14 Likes on 10 Posts
Default

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

Old 05-12-2017, 03:13 PM
  #3  
John 65
Le Mans Master
 
John 65's Avatar
 
Member Since: Dec 2003
Location: N J
Posts: 5,347
Received 403 Likes on 326 Posts

Default

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.


The following users liked this post:
MISTERZ06 (05-14-2017)
Old 05-12-2017, 05:08 PM
  #4  
69Vett
Safety Car
 
69Vett's Avatar
 
Member Since: Oct 2007
Location: Austin Texas
Posts: 3,729
Received 254 Likes on 230 Posts
Corvette of the Year Winner 2017
2016 C3 of Year Finalist

Default

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.
Old 05-12-2017, 06:20 PM
  #5  
sylviac4321
8th Gear
Thread Starter
 
sylviac4321's Avatar
 
Member Since: May 2017
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Default

Do you need a short water pump?
Old 05-12-2017, 06:24 PM
  #6  
John 65
Le Mans Master
 
John 65's Avatar
 
Member Since: Dec 2003
Location: N J
Posts: 5,347
Received 403 Likes on 326 Posts

Default

Yes, the original BB vettes used a short pump.
The following users liked this post:
MISTERZ06 (05-14-2017)
Old 05-12-2017, 06:25 PM
  #7  
sylviac4321
8th Gear
Thread Starter
 
sylviac4321's Avatar
 
Member Since: May 2017
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by John 65
Yes, the original BB vettes used a short pump.
What's best to run long headers, short headers or stock manford
Old 05-12-2017, 06:27 PM
  #8  
John 65
Le Mans Master
 
John 65's Avatar
 
Member Since: Dec 2003
Location: N J
Posts: 5,347
Received 403 Likes on 326 Posts

Default

Originally Posted by sylviac4321
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.
Old 05-12-2017, 06:31 PM
  #9  
sylviac4321
8th Gear
Thread Starter
 
sylviac4321's Avatar
 
Member Since: May 2017
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by John 65
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.
Old 05-12-2017, 06:34 PM
  #10  
John 65
Le Mans Master
 
John 65's Avatar
 
Member Since: Dec 2003
Location: N J
Posts: 5,347
Received 403 Likes on 326 Posts

Default

Far from an expert but you're very welcome.
Old 05-12-2017, 06:37 PM
  #11  
sylviac4321
8th Gear
Thread Starter
 
sylviac4321's Avatar
 
Member Since: May 2017
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by John 65
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?
Old 05-12-2017, 06:40 PM
  #12  
69Vett
Safety Car
 
69Vett's Avatar
 
Member Since: Oct 2007
Location: Austin Texas
Posts: 3,729
Received 254 Likes on 230 Posts
Corvette of the Year Winner 2017
2016 C3 of Year Finalist

Default

BB will fit with Oem master cylinder booster.
The following users liked this post:
MISTERZ06 (05-14-2017)
Old 05-13-2017, 02:16 AM
  #13  
scrappy76
Drifting
 
scrappy76's Avatar
 
Member Since: Jan 2011
Location: Hamilton Virginia
Posts: 1,853
Received 78 Likes on 68 Posts

Default

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.
The following users liked this post:
Cooter Tech (05-13-2017)
Old 05-14-2017, 09:32 PM
  #14  
Big Block Dave
Burning Brakes
 
Big Block Dave's Avatar
 
Member Since: Jun 2010
Location: Bellmore NY
Posts: 1,161
Received 91 Likes on 78 Posts

Default

Originally Posted by sylviac4321
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,
Old 05-15-2017, 10:37 AM
  #15  
Jbster
Le Mans Master
 
Jbster's Avatar
 
Member Since: Feb 2014
Location: hot 'lanta suburbs Georgia
Posts: 6,420
Received 14 Likes on 10 Posts
Default

Originally Posted by sylviac4321
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.

Get notified of new replies

To swap 350 engine to 454 engine




Quick Reply: swap 350 engine to 454 engine



All times are GMT -4. The time now is 05:30 PM.