Quadrajet Part Number Identification

Here is the breakdown on how to identify the Quadrajet Carburetor on your Chevy Vehicle, and some Dodge, or maybe one you may find at a Yard Sale or Swap Meet.

17058213
2377  BJB

Here is the Part Number we will use for the example

17058213
2377  BJB

Prefix code. "70" will appear on all late '60's Rochester Carburetors.
76 and later will start with "170"
5 = Decade produced.
702 = 1960's
703 = 1960's with A.I.R.
704 = 1970-1975
1705 = 1976-1979
1708 = 1980's

17058213
2377  BJB

Year produced.
8 = 1978

17058213
2377  BJB

Model
0 - Monojet (1 bbl) Federal standards
1 = Two jet (2 bbl) Federal standards
2 = Quadrajet (4 bbl) Federal standards
3 = Monojet (1 bbl) California standards
4 = Two jet (2 bbl) California standards
5 = Quadrajet (4 bbl) California standards
6 = VariJet (2 bbl) Fed

17058213
2377  BJB

Division.
0, 1, and 2 all indicate Chevrolet.
4 = Buick
5 = Olds
6,7 = Pontiac

17058213
2377  BJB

Transmission
Even numbers = Automatic Transmission
Odd numbers = Manual Transmission

17058213
2377  BJB

Date Code when Carburetor was actually manufacturered.
237 = 237th Day of the year
7 = Year 1977

17058213
2377  BJB

BJB = Customer code.


The Carburetor exampled is off my Late 1977 Chevrolet 1 ton Dually with Manual Transmission.
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