question regarding rear control arms and pinion angle

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Mark I'm getting rid of my JD's uppers $110 shipped, I am working with some one on my radial set-up and he wants me to test his out, or I wouldn't get rid of them. I have 6 passes on them before the car came apart...

As long as you get a lower that has the same geometry as the stocker you should not have to change it but it is always best to check.

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Aways check the pinion angle when you change anything. I have the megabyte jr lowers, and my angle was pretty far off. Adjusting the uppers made a big difference in traction. Also remember that the type of bushings matters too and the softer or more the bushings deflect, the more neg angle you should use.