EFI Fuel Tank Kit for LS and LT Swaps in 1973-1974 X-Body Nova/Ventura/Apollo/Omega
When you swap an LS or LT powerplant into a 1973 to 1974 X Body chassis the fuel system must meet higher flow requirements without sacrificing underbody clearance. The 1973 to 1974 Nova EFI Fuel Tank Kit with its 400 LPH Walbro pump addresses this by combining a steel tank shaped to match Chevy Nova, Pontiac Ventura, Buick Apollo and Oldsmobile Omega profiles while fitting directly into factory mounting points for a true plug and play solution. Shaped mounting flanges and a preinstalled regulator streamline installation and ensure stable fuel delivery for engines above 550 horsepower.
Precision 400 LPH Walbro Pump for LS and LT Engine Demands
The core of this EFI fuel tank kit is the 400 LPH Walbro pump calibrated to supply engines developing over 550 hp without faltering. By matching pump capacity to the peak requirements of LS and LT powerplants, the system holds fuel pressure within tight tolerances even under sustained high rpm. This precise output prevents lean spikes that can damage injectors or cause detonation, while delivering a reliable envelope of flow for hard acceleration and wide open throttle operation. As a result, tuners and builders can expect smooth throttle response and a consistent fuel supply whether on the street or at the track.
Internal Pump Placement Ensuring Cooling and Protection
Positioning the pump fully inside the tank allows the surrounding fuel to act as a heat sink, cutting operating temperatures and reducing wear on internal components. This submerged arrangement shields the rotor and seals from airborne contamination and keeps the module free of vapor pockets that lead to vapor lock in hot conditions or steep gradients. By maintaining cooler running conditions and continuous immersion, service life extends significantly and maintenance intervals grow longer. Consistent pressure delivery remains the hallmark of this design, so drivers experience no drop in performance during extended operation.
Chassis Matched Tank Geometry Preserving Clearance
Engineered to follow the contours of 1973–1974 Chevy Nova, Pontiac Ventura, Buick Apollo and Oldsmobile Omega floor pans, the replacement tank retains original ground clearance and body lines. It bolts directly into factory mounting points with no need for cutting or rewelding of frame rails, and aligns with the stock filler neck for a seamless fit. Inside, strategically placed baffles control fuel movement during cornering or braking, preventing slosh around the pump pickup. This attention to geometry ensures a restoration quality result that blends modern EFI capability with classic underbody appearance.
Complete Kit with Components for Streamlined EFI Conversion
This allinone package arrives ready for installation with the pump module, sending unit, regulator, tank straps, filler neck, vent filter, gaskets and hardware organized for quick assembly. By providing every necessary component in one box, the kit removes the need to hunt for fittings, adaptors or seals and cuts the risk of mismatched parts or leaks. Detailed instructions guide users from tank removal through pressure validation, making the conversion accessible to enthusiasts with basic mechanical skills. The result is a hassle free upgrade that saves hours of labor and ensures a durable, high‐capacity fuel system tailored for modern LS and LT swaps.
This design guarantees consistent delivery under demanding conditions; for a smaller capacity fuel pump kit at 255 LPH see our 1973-1974 Nova EFI Fuel Tank Kit - 255 LPH Pump.