1971 454 vette
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1st Gear
Joined: Oct 2024
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1971 454 vette
My front sway bar is missing. what size should it be? I have a 9 leaf rear suspension and 9/16 rear bar. The car still has its orig eng so I know its a real LS5 car. I found a post here that said all BB cars came with F41 suspension standard but that would mean a 7 leaf rear spring. Its a auto car. Its been off the road since early 80s. pretty unmolested car
Le Mans Master
Joined: Jan 2007
Posts: 8,078
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From: Omaha NE
2025 c3 ('74-'82) of the Year Finalist - Unmodified
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My info shows 15/16" for a '70-'72 BB...
Old Pro Solo Guy
Joined: Dec 2017
Posts: 8,135
Likes: 4,500
From: Marlton NJ
BB cars came mostly with std suspension. Some of them had the F41, but even that was mostly in 68/69. Not common in 70-74.
The std sb front sway bar is 7/8"
The BB front sway bar is unique to a BB, and is 15/16"
It doesn't sound like a lot of difference, but that makes it 30% stiffer.
Yes you have the correct rear sway bar, a 9/16" unit.
Both the front and rear sway bars are BB only items, and used on all BBs.
The rear stock spring is a std one.
The BB front spring is heavier than a SB spring, and if a no AC car, as most were, it should be like mine, an "HU" tag and 3931825 part #, and a wire diameter of .618" measured with a dial caliper. 10.0 coils, and a 15.25" free height. 284# spring rate. Same BB coil spring used from 68-74.
The ac springs is a little bigger diameter, at .645" and the F41 spring is .680". The SB is down around .600" dia.
The std sb front sway bar is 7/8"
The BB front sway bar is unique to a BB, and is 15/16"
It doesn't sound like a lot of difference, but that makes it 30% stiffer.
Yes you have the correct rear sway bar, a 9/16" unit.
Both the front and rear sway bars are BB only items, and used on all BBs.
The rear stock spring is a std one.
The BB front spring is heavier than a SB spring, and if a no AC car, as most were, it should be like mine, an "HU" tag and 3931825 part #, and a wire diameter of .618" measured with a dial caliper. 10.0 coils, and a 15.25" free height. 284# spring rate. Same BB coil spring used from 68-74.
The ac springs is a little bigger diameter, at .645" and the F41 spring is .680". The SB is down around .600" dia.
Melting Slicks
Joined: Jul 2004
Posts: 3,075
Likes: 221
My front sway bar is missing. what size should it be? I have a 9 leaf rear suspension and 9/16 rear bar. The car still has its orig eng so I know its a real LS5 car. I found a post here that said all BB cars came with F41 suspension standard but that would mean a 7 leaf rear spring. Its a auto car. Its been off the road since early 80s. pretty unmolested car
15/16
385.00 shipped for everything
extremely hard to find rubber bushing
i may or may not have the bolts but will look
I can restore 100.00
pm me if you need it
i also have a 71 454 auto that is 95 % restored
FYI ebay has just the bar for over 400.00
Thanks
grant
Last edited by grantstigers; Oct 3, 2024 at 12:23 PM.
