On my 1930 Chevy, at the points where the body is attached to the frame, there is a L-shaped bracket wieldesd to the frame and to the boby. These are the points where spacers are placed to line up the doors and such. Between these brackets is one flat rubber washer and a number of metak washers, depending on what is needed to line everything up.
My question, is there something better I can use as spacere that may also aid in absorbing the shock and still accomplish the same thing?