I bought an electronic copy ( .pdf file ) of the 39-53 GMC Light Duty Truck Master Parts Book from forum member SlimSix. Contact him via private message or maybe he will see this message and respond with current price info. Below is the 1st page.

Hey Andy, do I get a sales commission? wink
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'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.