3764476 is a '58+ 235 block. The casting date of 3/6/59 fits with the build date of 3/7 (the 307 part of the serial number). The B suffix from the serial number is for the 235 equipped with a powerglide transmission. That would make it a car engine with hydraulic lifters.


Curt
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1953 Chevy 6400, 1957 Chevy 2dr Sedan
--"Mediocrity is easy, the good things take time"