Another SB to BB conversion question
Thread Starter
Melting Slicks
Joined: Nov 2001
Posts: 2,659
Likes: 7
From: Katy (Houston) TX
CI 7-8 Veteran
Another SB to BB conversion question
OK, everybody seems to be asking about this lately.
What would it take to put this puppy in my '69 SB?
http://forums.corvetteforum.com/zerothread?id=417449
I assume I would need to buy a larger radiator and headers. What else needs to be done? Will the engine drop right in or do the engine mounts need to be modified? Will it bolt right up to my M-22?
What would it take to put this puppy in my '69 SB?
http://forums.corvetteforum.com/zerothread?id=417449
I assume I would need to buy a larger radiator and headers. What else needs to be done? Will the engine drop right in or do the engine mounts need to be modified? Will it bolt right up to my M-22?
Le Mans Master
Joined: Aug 2000
Posts: 9,662
Likes: 7
From: Semper ubi, sub ubi
Cruise-In VI Veteran
Cruise-In VII Veteran
Re: Another SB to BB conversion question (tshort)
Same mounts, same bolt pattern on the bell housing, different headers, different accessory brackets, probably different front springs and radiator.
Burning Brakes
Joined: Nov 2000
Posts: 948
Likes: 0
From: Johnston Iowa
Re: Another SB to BB conversion question (Smokehouse69)
The only thing that I would be curious about is how far can you bore a stock 454 block safely?
It sounds like that is what he has.
In order to get 509 cubic inches you need a 4.5 inch bore and 4.0 inch crank.
Can a regular 454 block be bored to 4.5 inches safely?
:rolleyes: :rolleyes:
It sounds like that is what he has.
In order to get 509 cubic inches you need a 4.5 inch bore and 4.0 inch crank.
Can a regular 454 block be bored to 4.5 inches safely?
:rolleyes: :rolleyes:
Safety Car
Joined: Dec 1999
Posts: 4,148
Likes: 5
From: Roxbury NJ
Re: Another SB to BB conversion question (tshort)
$2500! If that engine was within driving distance of NJ it would be in my garage already :)
James, it's most likely using a 4.25" stroker crank and a .1" or so overbore. Basically, a 496 built from a good and thick block. If it's NOT a thick block, things could get interesting. My local machine shop overbores 454 blocks .125" for their race engines, then throws them away when they inevitably crack. I've also heard about 4.375" stroke cranks, but I've never actually seen one.
-Joe
James, it's most likely using a 4.25" stroker crank and a .1" or so overbore. Basically, a 496 built from a good and thick block. If it's NOT a thick block, things could get interesting. My local machine shop overbores 454 blocks .125" for their race engines, then throws them away when they inevitably crack. I've also heard about 4.375" stroke cranks, but I've never actually seen one.
-Joe
