holley 2 bbl carb numbers.

where do you guys go to id a holley 2bbl?
I have a holley 2bbl that has the numbers on the front air horn as follows
3857993
75006
1358
and on the flat part behind the air horn is a cast 6r (5250) b

I put in the numbers and searched for it but came up blank. it has a top vent that's curved back over the choke flap so I'm thinking either dirt track or marine style carb.

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