Chevy and GMC front crossmembers are different where the front engine mount for the 6-cyl and the radiator support mount. That's the only engine bay difference I can think of. Out back the 54 frame rise over the rear axle is lower than on the 47-53.


"I always win." Working mainly alone I do not let my trucks win a war. Maybe a battle here and there but never the war.

Robert
55.1 GMC 450 COE
51ish GMC Suburban