popa,
according to the GM engineering information for a 3104 in my 1951 restoration pack, the height of the top of the frame at the rear is 25 3/4".


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!