KEVINSKI - Take a look at this Common Rochester B Series Carbs PDF listing in the Engine Shop Tech Tips sub-forum. wink

Those identity numbers for bowl and base come up on the list for 1954-59 Chevy Truck 261 applications. The original tag number is listed in far left hand column for the carb. wink


~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)