Just ran across this on the Filling Station. Link

Looks just like the one with the offset mounting bolt holes. Says it's an AC-405 pump used on 29-33 Chevy cars and trucks.
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Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.