Not true. Both front and rear 1972-74 bumpers and brackets move in just fine. For the front. Use the one square hole to mount brackets to framerail and drill a new hole for the other bolt. For rear bumper, cut bumper brackets. Move inward by overlapping and reweld. Works great. Use 1972-74 bumpers, brackets,fillers, everything. Then add 1970-72 bumper guard to fill slots in valance.
Done.
Good tip . Tried the front bumper on my Cuda. Worked great. Haven't done the back bumper not sure if I want to tackle it,
