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What fuel pump on the engine block is on a 1970 cutlass 350 with air and automatic? Mine has a 2 line, but I’ve read that with a/c it should be an 3 line, just trying to figure what I need. And who makes the best ones for sale
For the 1970 model year, Cutlii with 350 motors, automatic, and A/C got fuel return with the 2bbl carb but not with the 4bbl carb. Also, all W31s got fuel return and all 350s without A/C or with manual trans did not get fuel return.
Original pump with fuel return for the 2bbl 350 with A/C and automatic was P/N 6470332. This crosses to Delphi MF0006, GMB 5308060, and Carter M6109.
Original pump without fuel return for the 4bbl 350 with A/C and automatic was P/N 6470331. This crosses to Delphi MF0024, GMB 5301840, and Carter M6108.
From the parts book:
Last edited by joe_padavano; Mar 2, 2026 at 09:51 PM.
