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For our blue oval fans, I’m going to show you how easy it is to install one of Holley's OEM style EFI Fuel tank module with a 255 LPH fuel pump! These pumps are a direct fit for 1964-1970 Mustangs converting over to EFI! Holleys OEM style EFI Fuel tank module comes with 3 different float arms which cover mustang gas tanks from 64 through 70. Today were using a 64-68 tank. Our Holley EFI Fuel tank module comes from the factory with the 64-68 float arm so we wont have to remove our arm. Let's go ahead and get started.
Before you proceed with any electrical work ,make sure to disconnect both battery cables from your battery.
Make sure to use a 30 amp relay (Holley part # 12-753) and that you use a minimum of 12 gauge wire to supply the power to your pump.
Wiring:
FAILURE TO USE THE MINIMUM WIRE GAUGE COULD RESULT IN PUMP MALFUNCTION AND/OR an ELECTRICAL FIRE.
NOTE: Be sure to route all electrical wires clear of any moving suspension or drivetrain components and all exhaust components! Protect wires from abrasion and road debris.
Plumbing Note:
If connecting to factory vehicle fuel hard lines make sure that any rubber hose and clamps you use are rated for higher EFI Pressures.