Phew!
B'jour! Well it's hot here today, 32 C plus and now a problem to heat my brain up even more.
1. My information has suggested that the GMC engine is a US built 1954 Model 228 cu in GMC, from the block casting number. The head casting could be a date code J-6-4 for October 4 1954 which would make it a very late 1954 Model or perhaps a 1955 Model. # 2316477 is not known to me. The engine # appears to be # G 5502. "G" prefixes were used by GM of C during the war on GMC-built GMC 248 cu in engines. I am assuming here that GMC carried on post-war with G prefixes...I will see if I have a bore/stroke list to check.
2. # 193587 sounds like a car engine, lhd, but which year? It could be a Candian unit from 1948 but we really need the block casting number.
3. The 1958 TRUCK namely Jobmaster Six unit [261 cu in] had a lower compression ratio than the equivalent Pontiac Astro-Six 1958 unit and thus lost a few bhp, which went to 152 I think in '58 for the cars. I have no idea whether this was because they used a head with smaller combustion chambers in the car unit, or whether the head was planed to increase it. # 3836848 is a 1955 and 1956 Model 235 Head ...now I know of at least one Canadian engine that now runs a 1955 235 Head on a 1955 261 Block...no just found another known to me so that combo evidently works. I can't find a casting # 764476 so is it an engine # please? It could be a 1953 or perhaps a 1954 Canadian unit but we need the casting number again.
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