i put my 1946 chevy and 46 gmc and 38 gmc on a 1977 , 85 , 85 frames. i also havea 56 but i put a 1957 chevy pick-up frame under it . have you tied the 1988 up frame from the chevy a nd gmc pick-ups i have seen a few 55-59 chevy/gmc on them.thanks