The engine serial number (1st 3 digits are engine size) are on a machined surface just to the rear of where the distributor enters the engine block.
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6CylSerial.jpg (38.84 KB, 148 downloads)

Last edited by Bill Hanlon; 08/15/2023 2:11 AM.
'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.