What is the casting number on the exhaust manifold? There are many exhaust manifolds listed for 270/302 engines in the 39-54 and 55-60 GMC Master Parts Books. Sometimes you get lucky and the part number is one digit different than the casting number.
'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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