1964-1967 Oldsmobile Cutlass LS and LT EFI Fuel Tank Kit with 400 LPH Pump
For builders fitting an LS or LT powertrain into a 1964 to 1967 Cutlass chassis, this EFI fuel tank kit provides steady fuel pressure and reliable level feedback under demanding conditions. Installation is streamlined by a design that drops into the factory underbody recess and aligns with original mounting points using straps, gaskets and a vent filter. Additionally, the integrated Walbro 400 LPH pump remains fully submerged for cooling and is calibrated to support more than 550 horsepower, preventing lean spots during hard acceleration or sustained high rpm. A precision sending unit mirrors the stock resistance curve so drivers can trust factory gauge readings whether on the street or track.
Direct-Fit EFI Conversion for 1964 to 1967 Cutlass A Body
The EFI fuel tank kit is engineered to drop into the factory underbody recess of 1964 to 1967 Cutlass A Body models without modification. All mounting hardware including tank straps, gaskets, vent filter, filler neck, and bolts align precisely with original frame openings to preserve factory geometry. Technicians can complete installation using common hand tools, which reduces time and labor costs while maintaining a clean undercarriage. This careful fitment retains the vehicle's classic silhouette under the car and simplifies the swap process from start to finish. Builders benefit from a ready to install solution that respects the original chassis design and minimizes trial and error.
Walbro 400 LPH Pump Assembly Submersion and Thermal Management
At the heart of this kit is a Walbro 400 LPH pump fully submerged in the tank to harness the surrounding fuel as a natural heat sink. Cooling from the fuel bath prevents thermal buildup at sustained engine speeds, extending pump life even when supporting over 550 horsepower. Internal flow passages and secure electrical connections deliver consistent system pressure during sudden throttle changes or extended high rev operation. The robust design avoids fuel starvation in demanding scenarios such as racing or towing high load. By placing the pump inside the tank, the kit combines efficient cooling with reliable fuel flow to safeguard engine performance.
Precision Fuel Sending Unit Matching Stock Electrical Curve
The precision sending unit recreates the resistance pattern of the original Oldsmobile gauge to deliver reliable fuel level feedback. Its float arm travels smoothly without binding across the full tank depth and resists corrosion from modern fuel blends. By matching native electrical characteristics, it prevents erratic gauge readings or false empty alerts that can occur with generic units. This accuracy keeps drivers informed under acceleration or on long highway runs, eliminating guesswork about remaining range. Stable gauge response is critical for both street cruising and track sessions, ensuring confidence in monitor readings at all times.
Complete Hardware Kit Streamlines Assembly and Alignment
This fuel tank kit includes all necessary components from straps and gaskets to vent filter, filler neck and fasteners for a truly complete installation package. Each part is sourced and tested to maintain precise fitment with the Cutlass A Body frame openings, reducing the risk of leaks or misalignment. The vent filter prevents contamination while preserving proper tank breathability under pressure. Builders gain reassurance that every piece fits as intended, eliminating the need for aftermarket sourcing or custom fabrication. With all hardware at hand, the installation process becomes a straightforward sequence that saves shop time and avoids unexpected delays.
Trust in a precise fit and reliable performance. For a Smaller capacity fuel pump Kit at 255 LPH consider our 1964-1967 Cutlass EFI Fuel Tank Kit - 255 LPH Pump.