QFS LSx/ LTx EFI Swap 6AN Fitting Fuel Pump Hanger and Sending Unit for 1973-1991 Square Body Pickups C10/ K10 / R10 / C20 / K20 / R20 / C30 / K30 / R30 / V10 / V20 / V30

$134.98 - $299.98
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2.00 LBS

Looking for a fuel system solution for your 1973-1991 Square Body LS or LT Swap? Look no further! Quantum's brand new 6AN fuel pump hanger + sending unit is a clean sheet design, meant to facilitate the installation of braided AN hoses without using compression fittings and without splicing different connectors inside the tank. Every hanger comes standard with two wiring pigtails meant to fit the AC Delco EP381, as well as the Walbro 255LPH and other 340LPH In-Tank pumps. Quantum fuel pump hangers feature a lifetime warranty on both the Quantum fuel pumps themselves, as well as the sending units.

But wait! Swapping an LS or LT into your square body pickup requires more than just a new fuel pump. The entire fuel system needs to be upgraded in order to withstand the increased demand from a fuel injection system. The Quantum fuel system option takes the headache out of complex part selection and lets you add on genuine Phenix hoses and your choice of a Quantum brand filter/regulator or a Fuelab filter and regulator.

More details here:

NOTE: Do NOT select the pump + filter/regulator option if you want to add-on a fuel system. Each fuel system comes with a filter and regulator.


  • Applications: LS, LT, or any EFI swapped Square Body pickup
  • Fitting Type: 6AN Feed and Return
  • Coating: Corrosion resistant
  • Check Valves: Integrated check valve built into fuel pump outlet.
  • Type: In-tank Fuel Pump Hanger with Sending Unit
  • Wiring: 14 gauge Walbro 255LPH pigtail included. Plug and play adapter harness included for use with AC Delco EP381 pump.
  • Submersible high pressure rubber hose included, compatible with gasoline as well as ethanol based fuels (E85)
  • Serialized fuel pump body guarantees Lifetime Warranty


  • Safely LS/LT swap your Square Body pickup without using compression fittings
  • Purchase a hanger which has a fuel pump preinstalled
  • Eliminate failure prone splices and solder joints inside the fuel tank
  • Can be used on EFI LS or LT (L83/L86/LT1 swapped Square Body applications rated at 58psi
  • Lifetime Warranty

Pump and filter options available.

All Quantum brand products are backed by a lifetime warranty. Quantum products that fail at any time will be replaced under warranty if it is determined that the failure was due to a defect in workmanship or material. This warranty only applies to the original customer and is non-transferable. Improper use or installation of the product voids this warranty, and Quantum is not responsible for incidental costs resulting from failure of the product. In the unlikely event that you should need to request a warranty, please contact us at with your order information and a detailed description of the problem.


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