Carb Questions-HELP!!!

[MikeIIDC@domain.elided]

Okay, I am trying to get a rebuild kit for my '63 T'all (100 series,
2WD, BG220, 3-Speed).  I went to the parts store last night, and of
course, they have no listing for that model that year.  They have a 220
up to 1961, and again starting in 1964.  None in between.  I figured it
was probably the same as the 242(?), but I did take the carb off and
take it in with me, and it doesn't match up.  The carb that came off of
the engine is a "6R 894B" Holley 1 bbl.  The books don't even show such
a model in existence-not when looking under IH, but when looking it up
under Holley model numbers.

So, anyone know what I am looking at here?  Know where I can get a
rebuild kit for this one?  Know another carb that will fit?  Know why I
have this one on thee anyway?

Thanks for any help!

Michael