1970-1972 Oldsmobile Cutlass A-Body EFI Fuel Tank for LS Swaps
When installing an LS engine into a 1970 to 1972 Oldsmobile Cutlass A Body chassis, clearance issues between the stock fuel tank and modern exhaust or wider tires often arise. The 1970 to 1972 Cutlass EFI Fuel Tank Kit with a 255 LPH Walbro pump and precision notch solves these conflicts without altering the floor pan, while supporting engine outputs up to 550 horsepower. Supplied with a fuel pump module, sending unit, filler neck, vent filter, matched tank straps, gaskets and all installation hardware, this direct fit assembly simplifies the swap process for home mechanics by eliminating fabrication and ensuring a reliable seal and alignment with factory openings.
Application and Purpose
The 1970 through 1972 Cutlass EFI fuel tank kit delivers an exact match for Cutlass models undergoing an LS engine swap. The notched profile in the tank shell clears both the header tube and modern tire sizes, eliminating the need for custom fabrication. Removed material precisely follows the swept path of the rear tire and the exit of modern exhaust headers, leaving full capacity intact and avoiding any requirement to raise ride height or trim additional components. This careful contour reduces fabrication time and preserves tank strength by avoiding weak spots. By maintaining original mounting points, the design streamlines integration with factory body supports and preserves structural integrity under dynamic loads.
Performance and Capacity
Equipped with a high-output 255 LPH pump, this package sustains fuel delivery for builds rated up to 550 horsepower. The pump flows at consistent pressure during cornering and under heavy throttle, ensuring uninterrupted EFI operation even during extended high-load events. Located inside the tank, the pump is shielded from underbody heat, while its internal bypass valve stabilizes pressure across variable engine speeds to prevent system overpressure. This configuration aligns with recommended output ranges for most LS injector setups, ensuring compatibility with OEM or aftermarket fuel rails. A robust filter assembly further prevents debris from reaching injectors, reducing the risk of fuel starvation or lean mixture at peak demand.
Installation and Compatibility
This kit includes complete components for a straightforward DIY install. The sending unit is calibrated to the Cutlass gauge cluster, eliminating accuracy issues that often arise in retrofit projects. Bulkhead fittings and clamps come preassembled to guide correct orientation and torque values, while all hardware conforms to factory specifications. Designed for LS engine installations in A Body chassis, the system ensures proper drivetrain angles and accurate engine placement. Integration retains correct pump position relative to the sump, preventing air pockets and maintaining reliable fuel pick up under acceleration.
To complete your larger capacity fuel pump Kit at 400 LPH, consider our 1970-1972 Cutlass 400 LPH pump Tank Kit (notched).