Wheel Vintiques "Mopar Rallyes" (67 Barracuda)

That's great that you got your measurements. The rim location is constant compared to the pivot axis of the ball joint, but of course the "droop angle" affects the clearance to the arm itself, so it's good that you are checking all the angles. I'm not sure how the chassis weight would make any difference — the ball joint is a solid connection — flex in the inner control arm bushings or anyplace else wouldn't seem to matter, so long as the wheel bearings are good.

I haven't seen your pictures, but from your description it sounds like you might be OK.