EFI Fuel Tank Kit for LS and LT Swaps in 1964-1967 Oldsmobile Cutlass A-Body
For builders swapping an LS or LT into a 1964 to 1967 Cutlass A Body and pushing past 550 horsepower, this EFI Fuel Tank Kit with 400 LPH pump delivers reliable, steady supply under heavy throttle load and rapid rpm shifts. Designed for direct fitment to the factory underbody recess, the kit includes straps, vent filter and gaskets that align with chassis openings without cutting. Calibrated to stock Oldsmobile resistance curves, the sending unit glides through varied fuel depths and delivers accurate gauge feedback. Built in America with a low profile design, it preserves the Cutlass underbody look while meeting the needs of both street and track use.
400 LPH Pump Performance for Sustained Engine Output
The heart of this fuel tank kit is a 400 LPH Walbro pump that delivers a steady stream of fuel to LS and LT powerplants even when output exceeds 550 horsepower. By situating the pump assembly fully within the tank, surrounding fuel acts as a heat sink to prevent excessive thermal buildup and extend component life. This design maintains consistent rail pressure during rapid throttle changes and steep RPM climbs, eliminating the hesitation or lean condition that can arise under heavy load. The result is a reliable supply of fuel for both spirited street driving and demanding track sessions. Precision engineering of the pump housing and electrical connections also ensures minimal voltage drop, which optimizes flow rate and prevents voltage related performance dips.
Calibrated Sending Unit for Precise Fuel Level Feedback
Accurate fuel level monitoring is achieved through a sending unit that replicates the original resistance curve used in the factory Cutlass system. Its smooth float arm traverses the full range of fuel depths without binding or erratic movement, sending a stable signal to the dashboard gauge. By matching the vehicle's stock electrical characteristics, this module prevents sudden needle swings or false empty readings common with generic retrofit parts. Installers and drivers gain confidence from predictable gauge feedback, reducing fuel anxiety during extended drives. The design also resists wear from fuel additives and ethanol blends thanks to durable materials in the float mechanism.
Seamless Direct Fit Installation into 1964 to 1967 Cutlass A Body
This kit is engineered to drop directly into the factory underbody recess of 1964 through 1967 Oldsmobile Cutlass A Body models without the need for cutting or complex fabrication. Complete installation hardware includes tank straps, gaskets, vent filter, filler neck and mounting bolts that align precisely with original frame openings. Retaining the stock undercarriage profile preserves the classic look of your Cutlass while significantly reducing labor time. Technicians can follow existing frame holes and attach components with standard hand tools, keeping installation straightforward. The result is an upgrade in capability that respects the vehicle’s heritage and fitment integrity.
Built in America for Quality Assurance and Enduring Durability
All major components of this EFI fuel tank kit are manufactured in the United States under strict quality control measures that exceed industry benchmarks. Every pump, sending unit and piece of hardware undergoes performance and corrosion resistance testing prior to assembly to ensure consistent operation in varied climates and road conditions. American production also allows for traceable material sourcing and quick access to replacement parts if needed. The robust construction of straps and gaskets resists fatigue from chassis flex and road vibration, guaranteeing that the system remains leak free over time. This commitment to domestic craftsmanship translates into real peace of mind for builders and enthusiasts alike.
Count on consistent fuel delivery at any throttle level and for a smaller capacity fuel pump Kit at 255 LPH see our 1964-1967 Cutlass EFI Fuel Tank Kit - 255 LPH Pump.