check your trailing arms for any holes!!!! I did one on a 69 olds cutlass & there was only 1 hole in the arm, installed the bar with 1 bolt,& a clamp, drilled 2nd. hole, then added the spacers inside the trailing arm[so in doesn't crush when tightening the bolts] Easy peasy

OK that's a horse of a different colour!!! Never seen that set up!!!!

Hi Guys, I got the sway bar mounted! I elected not to use the piece to box in the arms it seemed like a needless step when it does nothing to improve performance and doesn't totally box in the trailing arm. Thanks for your responses they were helpful. Can't wait to get this car on the road!

 

StriperSS wrote:

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That piece is there for a reason. Likely you will crack one or both of your control arms before too long. They just can't take the twisting action that occurs as you corner. Experience talking here! :)

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 x2, they need to be boxed. 

Well that is something I hadn't considered, guess I'll be boxing them in today...it never ends...but that's okay. Thanks again.

I think he was working on an A body (69 Beaumont?), but not sure.

Same bar on both cars though, so the mounting stuff should be the same.

Carl Stevenson wrote:

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Same bar on both cars though, so the mounting stuff should be the same.

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Basically an A body sway bar is used on B Body cars, and there are spacers required to do that as the control arms are wider apart on the B body cars.   Also the way the bar bolts to the control arms is different between A body & B body cars.  I believe the spacers Carguy17 is talking about is to go in the control arms so they don't crush.

Carl Stevenson wrote:

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seventy2plus2 wrote:

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Carl Stevenson wrote:

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Same bar on both cars though, so the mounting stuff should be the same.

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Basically an A body sway bar is used on B Body cars, and there are spacers required to do that as the control arms are wider apart on the B body cars.   Also the way the bar bolts to the control arms is different between A body & B body cars.  I believe the spacers Carguy17 is talking about is to go in the control arms so they don't crush.

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Again I learn, sigh......!

I have pulled bars off A and B cars over the years and never noticed anything different. I thought they both just had two horizontal bolts through a strengthened control arm. What did I miss?

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In the middle photo of the 66 Impala above (looking rearward along the lower control arm) you can see 2 different spacers between the sway bar and the control arm.  The spacer closest to the sway bar can either be square or round, and there is two of them (one on each bolt).  The spacer closest to the control arm is a rectangular plate that covers both bolts.  The rear bolt goes all the way through the control arm, and requires a spacer within the control arm so it doesn't crush, but the front bolt only goes into the middle of the control arm.   I have the sheet from the GM assembly manual that gives the dimensions and how they bolt together.