BB vs SB rear end
Thread Starter
Instructor
Joined: Nov 2008
Posts: 157
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BB vs SB rear end
My brother has a 69 small block, that he intends to convert to BB at some point. His car is in the shop having a lot of suspension work done right now. The mechanic asked him if he wanted to install 'big block yokes' now since he plans to put a big block in later. I have no idea what a 'big block yoke' is, I would have guessed the rear end of a sb and bb would be nearly identical, I know they used different spring rates for the bb. Anyone know what this is, or what differences exist between a C3 bb and sb rear end?
Melting Slicks
Joined: Apr 2007
Posts: 3,189
Likes: 111
From: Tolland CT
My brother has a 69 small block, that he intends to convert to BB at some point. His car is in the shop having a lot of suspension work done right now. The mechanic asked him if he wanted to install 'big block yokes' now since he plans to put a big block in later. I have no idea what a 'big block yoke' is, I would have guessed the rear end of a sb and bb would be nearly identical, I know they used different spring rates for the bb. Anyone know what this is, or what differences exist between a C3 bb and sb rear end?
If he's doing this as a clone, he'll need the rear sway bar as well.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
What you need are the custom hardend yoke from a place like Mid-America. $299 each. Later year vettes came with 3 inch half shafts and 1350 U-joints
I like adjustability and the choices of rear mono leafs are not good. The rear QA-1 dual adjust coil over shock conversion kits are the way to go.
IMO - Tell your brother that small blocks with a whipple charger blower will kick the BBC's to the curb. Unless he is going for 540+ ci
I like adjustability and the choices of rear mono leafs are not good. The rear QA-1 dual adjust coil over shock conversion kits are the way to go.
IMO - Tell your brother that small blocks with a whipple charger blower will kick the BBC's to the curb. Unless he is going for 540+ ci
Pro
Joined: Apr 2005
Posts: 591
Likes: 7
From: Batavia IL
What you need are the custom hardend yoke from a place like Mid-America. $299 each. Later year vettes came with 3 inch half shafts and 1350 U-joints
I like adjustability and the choices of rear mono leafs are not good. The rear QA-1 dual adjust coil over shock conversion kits are the way to go.
IMO - Tell your brother that small blocks with a whipple charger blower will kick the BBC's to the curb. Unless he is going for 540+ ci
I like adjustability and the choices of rear mono leafs are not good. The rear QA-1 dual adjust coil over shock conversion kits are the way to go.
IMO - Tell your brother that small blocks with a whipple charger blower will kick the BBC's to the curb. Unless he is going for 540+ ci
LOL I'd put my 496 n/a bbc against a whipple smallblock any day.
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Monty is a 10 year member here who shows up from time to time, in a stock appearing C3 he put a 427ci small block twin turbo that put out 1200HP and 1000ft/lbs. He was into demolishing anything he met that thought they were up against a stock C3 and met his goals I believe he only raced it once to 9.xx @ 160+ mph if I remember correctly and that was 7 or 8 years ago 
There is also a link to his website where you can see his latest project
http://www.lateral-g.net/williams/
There is also a link to his website where you can see his latest project
http://www.lateral-g.net/williams/
Last edited by MotorHead; Sep 16, 2010 at 04:00 PM.
Melting Slicks
Joined: Apr 2007
Posts: 3,189
Likes: 111
From: Tolland CT
Not sure, stub axle may refer to the other end? The axle mounted to the trailing arm?
BTW: Regarding yokes. I've heard of some offered which are a bit overlength, allows for trimming to get the end play down. I don't recall the details. I had a shop replace mine. End play is very small now.
BTW: Regarding yokes. I've heard of some offered which are a bit overlength, allows for trimming to get the end play down. I don't recall the details. I had a shop replace mine. End play is very small now.
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Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
yes your drag racing wheely is impressive, But my friends 408 ci with 14 psi is a very mellow driver that runs around town under vacuum condition. Then you hit the go pedal on the 2000 CFM injection butterflies and it unleashes just over 700 RWHP. He has plans of back halfing the Vette. L480E tranny
Melting Slicks
Joined: Jun 2009
Posts: 2,343
Likes: 4
From: Anderson SC
Not sure, stub axle may refer to the other end? The axle mounted to the trailing arm?
BTW: Regarding yokes. I've heard of some offered which are a bit overlength, allows for trimming to get the end play down. I don't recall the details. I had a shop replace mine. End play is very small now.
BTW: Regarding yokes. I've heard of some offered which are a bit overlength, allows for trimming to get the end play down. I don't recall the details. I had a shop replace mine. End play is very small now.
-W
