83Limited

I am getting ready to do the neccessary bodywork and get ready to paint my 83 LE....will be pulling the front and rear bumpers/covers to repaint...my question is this, is there any adjustment for fitting the bumpers? I thought i had read somewhere that the mounting bracket on the bumper "shock absorber" could be adjusted in and out a bit? My back bumper could stand to go "in" slightly to be perfect, and my front bumper could stand to come "out" slightly....any thoughts?????