ChevelleForum.net

Go Back   Chevrolet Chevelle Forums > Chevrolet Chevelle Garage > Chevelle Engine & Trans

Reply
 
Thread Tools Display Modes
  #1  
Old 02-01-2017, 12:48 PM
size-o size-o is offline
Member
 
Join Date: Jun 2016
Location: Sherwood Park, AB, Canada
Posts: 47
Default Small Block to Big Block

At the risk of repeating this question, my 68 chevelle has a 327. I want to go with a 454. From what I have learned the mounting point on the frame does not need to change. I think it all comes down to the engine mounts themselves. Will the 327 mounts bolt onto the 454 and the engine should drop right into place, right Or.... and this is where I get stumped

Any help is always appreciated!!!

Perry
Reply With Quote
  #2  
Old 02-01-2017, 06:20 PM
RBeckman's Avatar
RBeckman RBeckman is offline
Senior Member
 
Join Date: Apr 2010
Location: Fenton Mi
Posts: 1,439
Send a message via MSN to RBeckman
Default

I'm pretty sure you have to get big block motor mounts and then it will attach to same frame mount.
__________________
Ric Beckman
1969 Chevelle SS396
1972 Camaro SS350
Reply With Quote
  #3  
Old 02-01-2017, 08:04 PM
chevymaher's Avatar
chevymaher chevymaher is offline
Senior Member
 
Join Date: Mar 2014
Location: Kentucky
Posts: 1,477
Default

Small block and big block mounts are the same. They interchange. Mounting points are in the same place on both.

So no matter what part you use on either. The motor is in the exact same place.

I had big block mounts on my small block. Way way back when this POS still ran and drove under its own power.
Reply With Quote
  #4  
Old 02-01-2017, 09:53 PM
RBeckman's Avatar
RBeckman RBeckman is offline
Senior Member
 
Join Date: Apr 2010
Location: Fenton Mi
Posts: 1,439
Send a message via MSN to RBeckman
Default

I did some checking and Big block and 327 have different part numbers for motor mounts.
__________________
Ric Beckman
1969 Chevelle SS396
1972 Camaro SS350
Reply With Quote
  #5  
Old 02-01-2017, 11:01 PM
shadowgray396's Avatar
shadowgray396 shadowgray396 is offline
Senior Member
 
Join Date: Dec 2009
Location: Oregon City, Oregon
Posts: 6,062
Default

The frame mount is the same and should bolt right in with the 454 motor mount
__________________
Ray
1970 SS Chevelle Van Nuys Built
Reply With Quote
  #6  
Old 02-02-2017, 06:17 AM
chevymaher's Avatar
chevymaher chevymaher is offline
Senior Member
 
Join Date: Mar 2014
Location: Kentucky
Posts: 1,477
Default

Quote:
Originally Posted by RBeckman View Post
I did some checking and Big block and 327 have different part numbers for motor mounts.
They do and there are different style of mounts. There are several actually. Some have the little hook inside the rubber so the motor doesn't flop free when it breaks. Some don't.

But the block mounting holes are in the same places for both. As is the hole for the pin where it goes through the frame. Those dimensions are universal.

Trivia all motors bolt right in if you have the motor mount to the motor. 4 cylinder iron duke. 4.3 6;s like my van has. small block and big block. Bell Housing bolts all mate up. Chevy was pretty good about that stuff back then.

I always liked the old impala deal. The little cables that wrapped on the bracket on the exhaust manifold to tie the motor down when the motor mount broke.

When I was young i was mixing and matching parts building cars alot. I had many a imapla motor in chevelles and camaros back then. V8's going in monzas. Nothing was sacred.
Reply With Quote
  #7  
Old 02-03-2017, 08:23 PM
size-o size-o is offline
Member
 
Join Date: Jun 2016
Location: Sherwood Park, AB, Canada
Posts: 47
Default

Thanks everyone. Much appreciated.

Perry
Reply With Quote
  #8  
Old 02-05-2017, 01:42 PM
size-o size-o is offline
Member
 
Join Date: Jun 2016
Location: Sherwood Park, AB, Canada
Posts: 47
Default

I'm having a hard time deciding which way I want to go. Now I'm thinking about going with an LS376. Motor pumps out 525HP vs my original plan of 540 CI pushing 700HP. Reliability is playing into my plans, plus my wife is saying "why 700HP??"...

Do the LS engines just drop in place? Any ups and downs or does it just boil down to preference?

Again, I appreciate your thoughts.

Perry
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 03:19 AM.



Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Audiokarma.org