I have a 1953 1/2 ton undergoing a frame-up rest. It is now sitting on its (old) tires and I installed a newly rebuilt 3.55:1 rearend last weekend. The dual acting shocks (from CD) wont reach the frame mounts - lacks about 1-2 inches. I have new springs (from same source) since one of the originals was busted. Could it be simply that the Cab and about 1000 pounds of sheet metal are missing? Has anyone else experienced this phenomena? Cheers