I have a problem with wheel rub. I have a transplant 396 in a convertible camaro. I've placed larger springs, but it still bottoms out. I wonder if replacing the control arm bumpers(possibly with larger one like Chevelles) Ken

Where do they rub, and under what conditions?
What size are the tires, and what size and backspace are the wheels?
Properly sized wheels and tires should not rub.