How is the left end of that little piece shaped? I'm agreeing with everyone else that that is a 230 or 250 engine, the square intake manifold tubes are a give-away on that much. We can help you a lot more with the serial number on the pad behind the distributor.

That carb looks like a Rochester Monojet or a similar one (Rochester BC, maybe?). The correct carb for a 230 or a 250 is a Rochester B or a Carter YF, depending on where it was sold (IIRC, someone will come along and correct me).

Drew W.
1966 Chevy C-10 Shortbed Stepside
1946 International Harvester I-4 tractor
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