1973-1974 X-Body EFI Fuel Tank Kit with 400 LPH Pump for LS and LT Swaps
The 1973-1974 Nova EFI Fuel Tank Kit - 400 LPH Pump addresses the common challenge of maintaining consistent delivery and preserving underbody clearance when swapping LS or LT powerplants into classic X Body chassis. It features a steel tank that matches original Chevy Nova, Pontiac Ventura, Buick Apollo and Oldsmobile Omega profiles and houses a 400 LPH Walbro pump submerged for cooling and protection while still using factory mounting points and filler neck alignment. Preinstalled regulator, seals and vent fittings streamline the installation process so builders can rely on steady supply for outputs above 550 horsepower without modifying frame rails or cutting brackets.
Precision 400 LPH Walbro Pump Matching LS and LT Demands
The heart of this EFI fuel tank kit is the 400 LPH Walbro module calibrated to support LS and LT engines producing more than 550 hp. Consistent output from the pump keeps fuel pressure within narrow tolerances even at sustained high rpm, preventing lean spikes that can damage injectors or cause detonation. By selecting a high-flow assembly that aligns with modern EFI requirements, tuners benefit from predictable throttle response whether accelerating on the street or pushing hard on the track. This precise matching of pump capacity to engine demand ensures the fuel supply never becomes a limiting factor in performance applications.
Submerged Pump Cooling for Consistent Operation
Mounting the pump fully below the fuel surface transforms the liquid into an effective heat sink, reducing operating temperatures and extending service life. This arrangement minimizes thermal stress on internal components, which in conventional external pumps can overheat and fail during prolonged high load. The in-tank environment also protects the impeller and seals from airborne debris and vapor lock, preserving performance on steep grades or in hot climates. As a result, users experience dependable pressure at all times and longer intervals between maintenance cycles.
Fuel Tank Profile Maintaining Original Underbody Clearance
Engineered to mirror the contours of 1973 to 1974 Chevy Nova, Pontiac Ventura, Buick Apollo and Oldsmobile Omega chassis, the replacement tank preserves ground clearance and body lines without modification. It uses factory mounting points and filler neck alignment so installers avoid cutting frame rails or welding new brackets. Internal baffles are positioned to balance fuel control around the in-tank pump module, preventing slosh during cornering without reducing usable capacity. This precision fit offers a restoration-grade solution for classic X Body owners seeking modern EFI capability.
Complete EFI Fuel Kit Streamlining Chassis Integration
This all-inclusive package arrives ready to install with the fuel pump module, sending unit, regulator, gaskets, vent filter, tank straps and filler neck preassembled. By eliminating the need to source individual fittings or adaptors, the kit saves hours of trial fitting and reduces leak points. Clear instructions guide the conversion from tank removal through pressure validation, making it accessible even to those with modest workshop experience. The turnkey nature of the kit accelerates project timelines and delivers a reliable system poised for both daily driving and spirited performance.
Count on consistent delivery under all conditions and for a smaller capacity fuel pump kit at 255 LPH see our 1973-1974 Nova EFI Fuel Tank Kit - 255 LPH Pump.