I myself have installed a 73 crossmember disk brakes the whole shooting match on a 61 chev 1/2. The frames are different in that the torsion bar frames are boxed and have a X member. Also they are different at the rear bumper. but the complete cabs beds and front sheetmetal will all interchange. between 60 and 66 models. the 63 up bumpers wont fit the earlier models. OldWolf
