You guys do realize that you are pointing his GMC question towards Chevy answers, right?
I know there aren't many (any?) differences in sheet metal, but the engine portion of a service manual would be way different.
The picture attached is from the GMC Master Parts Book covering the front sheet metal of his truck. It is no FAM, but it will at least show him what parts he needs.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12 '52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
