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350 Fuel Pump

Discussion in 'Chevy Trucks' started by Dave_Dean, Nov 2, 2003.

  1. Dave_Dean

    Dave_Dean Junior Member
    Messages: 28

    I am trying to figure out which fitting on the bottom of the fuel pump is the supply line and whick is the return line. I am converting to FI and I need to know which is which. Thanks

    CARDOCTOR PlowSite.com Addict
    Messages: 1,312

    supply line is usually the larger of the two

  3. wyldman

    wyldman Member
    Messages: 3,265

    Supply is usually 3/8",and the return is usually 5/16".