Getting ready to mount my 52 GMC Ambulance body back on the frame. Wondering if anyone has used solid polyurethane blocks instead of wood and rubber pad? Would the poly blocks be too hard, or break down? Would they need the rubber pad or be enough cushion without? Also, I'm not real excited about the carriage bolts that came with the kit from Carters (not the right blocks either by the way). Do you use a better bolt ie higher grade or SS or Size?
Thanks Richard