Are you referring to the wheel "spacer", as a "bushing"? You, or someone must be or has, way over tightened the axle nut at some time, if your talking about the "spacer" pulling thru the pressure plate, or one or the other is either soft, or undersized. Here's the way I look at it, if you go to splined centers, the cost is going to be on the up side, of what it may cost for new pressure plates, it that is the problem. Another fix, is as you said, remove the drive pins, and press in wheel studs, but I'd look for the "cause", before I did anything, just a suggestion. Bob