actually I have two trucks with the later model frames
one of which we added a piece of 2x6 channel in to fill in the frame dip to allowthe use of origional cab mounts for the 56
on the other one which I did not do myself it simply has taller mounts the White truck in the picture above is on an 80 model 4x4 frame it has an aftermarket 2 1/2 inch lift
this photo shows the piece we added into my frame on the 56 it is an 80 model short bed frame
Gene Sharp
