Info on this intake manifold B1866695F

[canbluegm]

I have an intake manifold for a carburetor. Here is the info from the casting.
B1866695F
1 GM
H 211

I have not been able to determine the engine/model that this would sit on. Anyone have some info on this?

Trying to add a picture, but not having much success.

[crusher71]

1964-65 BUICK 300 V8 GOOGLE MAKES LIFE SIMPLE... YOU SHOULD TRY IT SOMETIME....