Hi THarper, welcome to the forums.

Everything on this engine is consistent with the last design of the 235 introduced in '58. The block casting numbers you have provided decode as: CONV4 = conveyor number 4 in the casting plant, B222 = February 22nd 1962. This was the last year of 235 production. The number on the dizzy pad F = Flint Michigan (the other plant producing these engines was in Tonawanda New York which carry T prefix). The rest of the sequence (0223) is a date code = February 23rd. So it was assembled the day after it was cast. The suffix A means it was a run-of-the-mill engine destined to be installed in 3 speed stick shift car. The head casting # was introduced in the second half '55 was used consistently through the end of 235 production.

regards,
stock49

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