1973-1974 X-Body Fuel Tank Kit for LS and LT Engine Swaps
The 1973-1974 Nova EFI Fuel Tank Kit with its 400 LPH pump addresses the need for consistent fuel delivery and factory underbody clearance when installing an LS or LT engine in a classic X Body chassis. By retaining original mounting points and tank contours for Chevy Nova, Pontiac Ventura, Buick Apollo and Oldsmobile Omega models, it drops in without altering frame rails or reducing ground clearance. With the Walbro module submerged in the tank for cooling and protection, this EFI fuel tank kit delivers stable flow for setups above 550 horsepower and arrives complete with all seals, fittings and regulator preassembled for a straightforward fitment.
Precision Calibrated 400 LPH Fuel Delivery for LS and LT Engines
The 400 LPH Walbro pump at the heart of this EFI tank kit provides a high-flow solution for powerplants above 550 horsepower. Its calibrated output ensures that fuel pressure remains consistent under sustained high rpm, preventing lean conditions that can compromise injector performance and lead to detonation. By matching the pump's flow rate to the demands of modern LS and LT EFI systems, the kit delivers reliable throttle response whether you are cruising or on the track. With minimal variance in output, engine tuning remains predictable and allows for safer operation at elevated boost or rpm levels. Enthusiasts gain confidence knowing the fuel supply will never become a limiting factor in spirited driving scenarios.
Submerged Pump Cooling Extends Service Life under Load
Installing the pump fully inside the fuel volume uses the liquid itself as a heat sink, maintaining lower operating temperatures than an external assembly. This arrangement reduces thermal stress on the pump motor and internal components, which can otherwise degrade rapidly during extended wide open throttle runs. Since the module is protected from debris, there is less chance of cavitation and premature wear in the impeller and seals. The result is a pump that resists vapor lock during steep inclines and hot ambient conditions, translating into dependable performance across daily driving or demanding track use. Maintenance intervals also stretch out, as the cooler operating environment slows down wear mechanisms.
Factory Contoured Tank Design for Classic X Body Chassis
Every curve of the replacement tank matches the underbody profile of 1973-1974 Chevy Nova, Pontiac Ventura, Buick Apollo and Oldsmobile Omega models, preserving ground clearance and original body lines. By retaining the stock mounting brackets and filler neck alignment, installation avoids cutting or drilling the frame rails, so chassis integrity remains intact. Internal baffles have been engineered to accommodate the EFI pump module without sacrificing fuel capacity or allowing excessive slosh in cornering situations. This precision fitment offers classic car owners a restoration-grade solution that supports modern powertrains while keeping the original chassis layout unaltered. The result is seamless integration of contemporary fuel delivery in a vintage package.
Complete Retrofit Kit Simplifies Fuel System Integration
All necessary hardware ships preassembled, including the sending unit, regulator, gaskets, vent filter and mounting straps, so there is no need to hunt down fitting adapters or seals. The Walbro module and internal pump assembly arrive ready to bolt into place and connect directly to factory lines, saving hours of fabrication and reducing the risk of leaks. Detailed instructions walk installers through each stage of the conversion, from tank removal to final pressure check, ensuring a consistent outcome even for those with modest mechanical experience. This all-inclusive approach translates into rapid turnaround for engine swap projects and a fuel system that performs reliably from the first startup. Whether you are upgrading a weekend cruiser or building a race car, the kit delivers a professional solution out of the box.
Count on MuscleRods for precise EFI integration and for a smaller capacity fuel pump Kit at 255 LPH see our 1973-1974 Nova EFI Fuel Tank Kit - 255 LPH Pump.