From the VIN, this truck was originally equipped with a 350 2 barrel motor. The motor that is in it now has a 4 barrel intake and carburetor. After some cleaning, I pulled the engine codes off of the block:
- Casting code: “3970010”
- 1969-1979 350CID V8 2 or 4 bolt, car, truck, Corvette
- Stamping code: “V0715CMB”
- V- Flint (engine)
- 07- July
- 15- 15th day
- CMB- 350, 4brl, 155HP/250lbft, F, LM1, Nova/Camaro
- VIN code: “15N653303”
- 1- Chevrolet
- 5- 1975
- N- Norwood
- 653303- production sequence of vehicle VIN
I removed the carburetor and gave it a good cleaning as well as a new fuel filter. The carb is a Rochester QuadraJet stamped “7044206” and “L3 © FA”. I could not find any information on the second set of characters, but the first set comes back as:
- 704- 1969-1975 4 barrel Quadrajet
- 4- 1974
- 2- 49 state (federal) emissions
- 0- Chevrolet
- 6- Automatic transmission