jeffbanjo -- The original carburetor on a 1948 216 would be a Carter type W-1 model number 574s.

As GM owned Rochester (first single barrel carb in 1950), the Chevrolet parts manuals printed after 1950 suggested the Rochester as a factory service carb. This is why the information in your manual differs from the carburetor you have.

(Opinion) the Carter W-1 is a vastly superior carburetor to the Rochester model B.

Jon

Last edited by Peggy M; 08/30/2024 4:03 PM. Reason: Remove quote - not necessary ;)
Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop