LS and LT Fuel Tank Kit for 1978-1980 Oldsmobile Cutlass
Installing an LS or LT powerplant in a 1978-1980 Cutlass Notchback demands a fuel delivery solution that manages rapid throttle inputs and sustained high rpm operation, a challenge met by the Cutlass Notchback EFI Fuel Tank Kit equipped with a 400 LPH pump. Built to fit into the factory tank opening without modifying original mounts, it relies on molded gaskets and heavy gauge steel straps for secure installation. A precision sending unit and integrated vent filter maintain stable pressure under ethanol blends or track conditions. Zinc coated hardware and corrosion resistant fittings connect directly to LS and LT harness plugs, reducing bench work and preserving factory appearance.
Integrated 400 LPH Walbro Pump Module
The heart of this kit is a 400 LPH Walbro pump designed to support LS and LT engines up to 550 horsepower without risking a lean condition under rapid throttle transitions. Engineered for continuous operation, the pump's impeller and motor components are precision matched to maintain flow even when the engine is pushed to high rpm or subjected to heat soak. By housing the pump inside the factory tank opening, builders avoid the complexity of external mounting brackets or extra fuel lines. This in-tank module also helps reduce noise and keeps fuel temperatures lower, enhancing performance consistency whether on the street or at the track.
Precision Factory Tank Fitment and Seamless Harness Connection
Every component in this assembly is dimensioned to drop into the original Cutlass tank opening, eliminating any need to cut or rework the sheet metal. Molded gaskets create a vibration resisting seal that adapts to temperature shifts without leaking, while heavy gauge steel straps secure the module with even clamp pressure. The sending unit and vent filter attach to factory mounting points and link directly to LS and LT harness plugs without adapters or splices for true plug and play installation. This approach preserves the vehicle's original appearance and dramatically reduces bench time by removing fitment guesswork.
Ethanol Compatible Seals and Corrosion Resistant Hardware
Modern pump fuels often contain ethanol blends that can damage standard rubber components over time, so all gaskets and sealing surfaces in this kit are tested for chemical stability to resist swelling or hardening. An integrated vent filter balances internal tank pressure with the atmosphere to prevent vapor lock when the engine works hard or encounters high underbody temperatures. Zinc coated fasteners and steel fittings resist rust from road moisture and fuel contaminants, extending service intervals and ensuring the assembly maintains its sealing integrity. Together these elements promise dependable operation from daily commuting to competitive driving.
Rely on precise fitment and consistent flow. For a smaller capacity fuel pump Kit at 255 LPH consider our 1978-1980 Cutlass Notchback EFI Fuel Tank Kit - 255 LPH Pump.