Can you post a picture of where you think it is rubbing up front?

For the rear I'd start by removing the small spacers and see if that fixes the problem. If so that will give you a bunch more info to help determine the permanent fix.

70 challenger convertible. 340/5 speed. blown, intercooled, efi, blah blah blah 71 valiant scamp 318/A833OD/AC/PS 00 dakota RC 4.7L 5 spd autoX'r. SRT10/T56 swap in process 73 W200 Power wagon, PTO winch, 4 spd