I agree with Dan that the engine is GMC, but the carb is not one used on a GMC engine from the factory. There is an adaptor under the carb to mate the front to back mounting on the manifold to the side to side mounting on the carb.
'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.
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