I have spc upper a arms, ats stock height, stock lower arms. I purchased this some years ago. My issues from the pics is the upper arms are resting on the frame. My hours don't allow me to call marcus and just wondering if anyone here can help. I switch the upper ball joint to a tall to see if that would help which it did not. These are on. 71 chevelle.
Last edited by Sanchez Garage; 09-22-2014 at 08:02 PM.
Your control arms look to be on the wrong side. The bolt on the ball joint plate should be to the rear. To gain more clearance you could bolt the ball joint in from the bottom. What ball joint are you using? The best thing would be to find the time to call marcus or at least e-mail him. He might have a recommendation for a different ball joint plate.
Those arms are older models configured for ATS *TALL* spindles. With the tall spindles the upper arms will be angled upward toward the ball joints 8-10 degrees at recommended ride height, giving the arms lots of clearance. To allow for a wider range of ride height adjustment later versions of the arms use vertically offset one piece forged pivots that give the arms even more clearance. You can retrofit these to your older arms. We still have a few left in stock. When running these arms with stock spindles and tall ball joints we use a tall lower and extra tall severe duty upper for best geometry and clearance. You can`t (well, you shouldn`t) use tall lowers with the ATS short spindles because it will ruin the bump steer curve but you can use the xtall uppers. If the taller ball joints you bought are only +.5" you can (and should) go for the Xtall. The geometry will be substantially improved as well as the clearance. As awesome as the tall ATS spindles are the short ones from years ago are sort of black sheep. Without the geometry change of the taller ball joints your car has had the bump steer dealt with but the camber curves and roll center height/migration basically remain bone stock so the xtall uppers would be a very good idea anyway.
Looks like a bare frame. You need the car fully assembled and at ride height before worrying about this. As it sits now the springs are not compressed under their normal load.
Looks like a bare frame. You need the car fully assembled and at ride height before worrying about this. As it sits now the springs are not compressed under their normal load.
What springs did you use?
Don
100%. Car has to be at ride height before its an issue.
I also believe the cross shaft is flipped. It looks like the the offset where the arm bolts to the cross shaft needs to be flipped. The slight offset should give you more clearance to the frame.
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Need help with spc upper arms
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