i've got a good 74 4x4 scottsdale chassis, and a 2wd 84 custom deluxe. both trucks are longbeds. my question is will the 84 body fit on the 74 chassis? if so, which body mounts wood you use, 84 or 74? i've had the 84 since 1993 and the body is in very good shape and i just got through assembling a new 350 for it but haven't installed yet.