400 LPH EFI Fuel Tank Kit for LS and LT Swaps in 1971-1972 Pontiac GTO/Lemans
When retrofitting an LS or LT powerplant into a 1971 and 1972 Pontiac GTO or Lemans chassis, tight clearances around the exhaust and rear tires often lead to fuel flow restrictions that jeopardize performance. This EFI Fuel Tank Kit uses a notched steel reservoir housing a 400 LPH Walbro pump and integrated sending unit to maintain steady pressure even under sustained wide open throttle. By matching the tank's profile precisely to factory frame rails, installers can bolt on the assembly without cutting or welding while relying on accurate level readings and a protective fine mesh filter against vapor lock. Complete with mounting brackets, straps, gaskets, and adapter fittings, the kit streamlines installation and safeguards against leaks for a reliable fuel system retrofit.
Precision Steel Reservoir Cut to Factory Frame Contour
The fuel tank is crafted from heavy gauge steel that is precisely notched to match the exact routing of the exhaust and rear tire arc on 1971-1972 Pontiac GTO and Lemans chassis. By removing material only in essential areas, the design preserves original frame strength and creates consistent clearance without compromising structural integrity. This tailored contour allows installers to align the reservoir on stock rails and secure it with existing mounts, eliminating the need for any cutting or welding. Each tank profile is CNC cut to ensure repeatable fitment across multiple vehicles. The result is a seamless integration that respects factory dimensions while accommodating modern engine placement.
400 LPH Walbro Pump Delivering Consistent Flow under High Load
At the core of the kit lies a 400 liter per hour Walbro pump selected for its ability to sustain commanded flow rates in LS and LT engines producing more than 550 horsepower. Its internal design features robust vanes and a durable housing that resist cavitation at high rpm and help dissipate heat in a confined tank space. This pump maintains steady pressure during extended wide open throttle conditions, safeguarding against lean fuel mixtures that can damage internal engine components. Drivers will notice smooth throttle response and consistent fueling across all engine speeds. Maintenance intervals are extended thanks to the pump's sealed motor and corrosion resistant construction.
Integrated Pump and Sending Unit Ensuring Accurate Monitoring
This assembly combines the fuel pump, level sensor and a fine mesh vent filter into a single sealed module that mounts directly into the reservoir. The calibrated float arm delivers reliable fuel level readings under hard acceleration and cornering by preventing air pockets from disturbing the signal. Internal flow channels are engineered to keep the pump inlet submerged at all times, reducing wear and prolonging service life. Factory style connectors match the original harness and seal out moisture for uninterrupted signal transmission. The integrated design streamlines the internal plumbing and avoids loose connections that can lead to fuel leaks or erratic gauge behavior.
Complete Ready to Install Hardware Kit for Effortless Retrofit
Every component needed to convert the stock tank for electronic fuel injection is included, from tank straps and mounting brackets to gaskets and adapter fittings. Brackets are pre formed for direct placement on factory rails, while the included vent filter and filler neck adapter ensure seamless plumbing into existing openings. With all fasteners and seals supplied in one package, installers can avoid parts sourcing delays and reduce the risk of missing or mismatched hardware. The result is a straightforward installation process that can be completed in minutes and yields a leak free fuel system. This comprehensive kit approach minimizes labor time and delivers a professional grade retrofit.
Count on MuscleRods for a precise installation and for applications requiring a Smaller capacity fuel pump Kit at 255 LPH see our 1971-1972 GTO 255 LPH pump Tank Kit (notched).