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Thread: square body 5.3 swap fuel system

  1. #1
    Join Date
    Jul 2009
    Location
    Oklahoma City
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    152

    square body 5.3 swap fuel system

    Those of you the have swapped in a square body. How did you do your fuel system? Like what tank, what sending unit, what fuel pump, what fuel lines. And this is with the return style fuel rail.

  2. #2
    1987 Fuel Tank and sending unit. In-tank pump, walbro 255 is common as well as any pump from 1996-up trucks (OEM). Lines, you can either do the fuel injection rated rubber lines and correct fittings, or a lot of people do the stainless braided lines with AN fittings and adapt it into the fuel system.
    1997 Silverado 1500
    Stepside, Regular Cab, 5.7 L31/4L60e
    True duals through Flowmasters, 15x8 Cragar D-Windows

    1979 C10 SWB Custom Deluxe
    Vortec-headed 350/TH375 build in progress

    2010 Mustang GT Premium
    Daily Driver, C&L CAI, SLP Loudmouth Axlebacks, Dyno-tuned

  3. #3
    Join Date
    Oct 2012
    Location
    San Antonio, Tx
    Posts
    13
    Quote Originally Posted by Short97Stepside View Post
    1987 Fuel Tank and sending unit. In-tank pump, walbro 255 is common as well as any pump from 1996-up trucks (OEM). Lines, you can either do the fuel injection rated rubber lines and correct fittings, or a lot of people do the stainless braided lines with AN fittings and adapt it into the fuel system.
    Adapt them to the stock steel lines? Is there any additional filter needed since the return style already has a regulator?

  4. #4
    Join Date
    Dec 2008
    Location
    san antonio TX
    Posts
    1,365
    yes the filter is needed. you can adapt to the steel lines with a AN to tube adapter fitting. i just ran new -6 hose
    1982 c10 lsx swaped, NP tuned, true duals, 4:11s, trutrac, e-fans, CAI

  5. #5
    Join Date
    Jul 2009
    Location
    Oklahoma City
    Posts
    152
    Sp you ran factory 87 lines? Mine are from an 81 on the opposite side of the truck for the carb.
    lechez71 what brand/part number lines did you use and adapters?

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