I just called PST to order the Polygraphite Super kit and they asked me if my ??"control arm bushings"?? were round or oval. I have two questions related to this. First, since I am not a suspension guy where should I find these round or oval bushings they are asking about. The second question in regards to this is that I have always heard that the SS came with certain ones, whether that is round bushings or oval I am not sure. Could somebody clarify this for me.

I was also asked about the diameter of my sway bar. I measured it to be 4". Is this consistent with a true SS?

Thanks
Mike

If you look at the lower control arm bushing, you can tell if they are oval or round. The easiest way to measure the sway bay is to use a large crescent wrench and adjust it to fit over the bar snug and then measure the distance between the jaws.

Look at your front lower control arms. They each have 2 bushings, the front one is always round. The rear one can be round or oval.

They started using ovals in 1970, and they were meant for NON-SS models, but when supplies of either got low, the others would be installed. There have even been cars that came with one of each! SS cars should have round.

Sway bar should be either 15/16" or 1-1/8" (F41). Just see what size wrench fits over it.

So if the cars could have either came with oval or round then I technically could put either on my car. What I understand is that the bushings are not "Control Arm" specific. If I have ovals now then rounds would work correct. I do not have a build sheet so I am not sure if this car is a clone or not. If it is a clone it was a very well done clone. So far everything shows SS.

Thanks

if theyre oval you gotta use oval round goes into round. You cant miss it if its oval. Jim

Guys thanks for the info. I discovered that my car has one round in the front (thanks Derek) and one oval in the rear. So there is no way for me to make the rear oval without replacing the control arm correct? If there is a way to do this without changing the control arm and to use a round in the rear please let me know. The sway bar is a 1-1/8. So is this a definite tell tale sign that the car is not an SS or could this be the fact that the factory ran low on the round bushings? I believe that I have the correct sway bar, I have the correct boxed (rear) control arms etc... Any inputs?

Thanks
Mike

Guys thanks for the info. I discovered that my car has one round in the front (thanks Derek) and one oval in the rear. So there is no way for me to make the rear oval without replacing the control arm correct? If there is a way to do this without changing the control arm and to use a round in the rear please let me know. The sway bar is a 1-1/8. So is this a definite tell tale sign that the car is not an SS or could this be the fact that the factory ran low on the round bushings? I believe that I have the correct sway bar, I have the correct boxed (rear) control arms etc... Any inputs?You will need different control arms if you want round "correct for SS" bushings.

It's not a definite sign of not being a true SS, as there have been other SS's found to have had oval bushings too. It does, however raise a flag.

Besides Ebay does anyone have any idea where I can get a set of lower control arms with two round bushings?

You might check the classifieds here, also any control arm before 70 will have round bushings in both positions and will interchange.

You might check the classifieds here, also any control arm before 70 will have round bushings in both positions and will interchange.


Thanks for the info.

I beleive there are new repro arms available from places like Ground Up.

If you have any salvage-yards around with old stuff, any '68-69 A-body will have round bushings. Ovals were introduced in '70 to soften the ride, but the added deflection worsened performance, so SS and F41 equipped cars still recieved round.

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Try here;

http://www.randys-racemart.com/64chlocoarmn.html

I was dropped this link by Peter F

So if I buy a set of lower control arems that are round to replace my current oval rear bushings will I need to do any modifications when installing the new replacement arms?

Nope, they're the exact same except for the shape of the hole the bushings press into, so they'll go right on without changing anything else.