1968-1970 Pontiac GTO/Lemans A-Body LS and LT EFI Fuel Tank Kit
A frequent weak spot in LS and LT conversions on 1968-1970 Pontiac GTO and Lemans A Body chassis is the factory tank's inability to meet modern flow requirements, and the 1968-1970 GTO / Lemans EFI Fuel Tank Kit - 400 LPH Pump solves this by installing a Walbro 400 LPH unit fully inside the original fuel reservoir. Retaining every stock mounting point and seal surface means there is no cutting or welding during installation and chassis geometry remains unchanged. Surrounding the pump with fuel allows the liquid to act as a natural heat sink, preventing vapor formation due to rising temperatures under sustained throttle and maintaining steady pressure even with ethanol blends. An integrated sending unit rounds out the assembly by delivering accurate level readings on rough roads and spirited driving conditions.
Optimized Fuel Immersion Cooling
Positioning the 400 LPH pump fully inside the A Body fuel reservoir allows continuous contact with liquid, turning the fuel into an effective heat sink. This internal cooling approach prevents vapor lock during sustained engine demands and guards against dry spots that can interrupt supply. The design also cuts noise by using the tank walls as sound insulation and eliminates aeration in the lines for a smoother, more reliable flow to the injector rails under all driving conditions.
Plug and Play Integration for Classic Tanks
The EFI tank module is engineered to drop into fuel reservoirs from 1968 to 1970 Pontiac GTO and Lemans without cutting or welding, preserving every original seal surface and mounting point. Precise contour matching maintains filler neck alignment and vent channel integrity so chassis geometry remains unchanged. Installation requires only common hand tools plus the supplied gaskets, straps, hardware and vent filter, completing in a single afternoon while leaving factory underbody appearance intact and fully reversible.
Precision Level Sensing for Ethanol Compatibility
An integrated sending unit with precision resistor technology converts actual fuel volume into a stable electrical signal for the dash gauge. Corrosion resistant materials stand up to ethanol blends and modern additives, while its built-in damping action smooths out gauge swings caused by road vibration or sharp maneuvers. The result is consistent level feedback, preventing false low warnings during spirited runs or steep grades and ensuring drivers have accurate range information at all times.
High Flow Capacity for Forced Induction Builds
Specifically rated to support supercharged applications and naturally aspirated engines exceeding 550 horsepower, the 400 LPH Walbro pump delivers a robust flow profile that keeps the air fuel mixture in proper balance at high rpm. Rigorous bench and vehicle testing confirm stable pressure under peak load, protecting against lean-out during sudden throttle bursts. This margin also accommodates future power upgrades, giving engine builders the confidence that their fuel supply will meet evolving performance targets.
For a Smaller capacity fuel pump Kit at 255 LPH see our 1968-1970 GTO / Lemans EFI Fuel Tank Kit - 255 LPH Pump. Count on MuscleRods for dependable support in your project.