1968-1970 Pontiac GTO and Lemans LS and LT EFI Fuel Tank with 400 LPH Pump
Swapping an LS or LT engine into a 1968 to 1970 Pontiac GTO or Lemans demands reliable fuel flow and this EFI Fuel Tank Kit answers that by placing a 400 liter per hour pump entirely inside the factory reservoir. Installation keeps every original seal surface and bracket location intact so there’s no cutting or welding on your A Body chassis. Surrounding the pump with liquid fuel converts the tank into a natural cooling vessel that prevents vapor lock under sustained throttle or when running ethanol blends. An integrated sending unit ensures accurate level readings even during spirited driving, giving you consistent feedback on your remaining range.
Advanced Immersion Cooling for Pump Durability
By situating the 400 LPH fuel pump entirely within the original reservoir, this EFI Fuel Tank Kit transforms the surrounding fuel into a continuous coolant. Liquid contact absorbs heat generated during sustained throttle openings, preventing vapor formation that can interrupt supply at high engine demands. Noise levels drop as tank walls buffer mechanical sounds, improving cabin refinement without added insulation. Continuous submersion also removes dry spots that lead to erratic pressure, ensuring smooth, consistent flow to the injector rails. This design enhances service life by keeping internal components at stable temperatures under all driving conditions.
Factory Fit Installation Maintaining Original Integrity
The kit retains every stock seal surface and bracket location, allowing installation without altering the A-Body chassis or fuel reservoir. Fuel lines, fill neck, and vent channels remain in their factory positions to preserve alignment and chassis clearances. Assembly requires only common hand tools plus the supplied gaskets, straps, hardware, and vent filter, completing in a single afternoon. Since there is no cutting or welding, the process is fully reversible for restoration or resale projects. Owners maintain the classic underbody appearance while modernizing fuel delivery for LS or LT engine conversions.
Integrated Sending Unit for Precise Range Feedback
An advanced sending unit is built into the tank module to provide accurate level readings even on rough roads or spirited driving. Its precision resistor technology translates actual fuel volume into a stable electrical signal, reducing gauge swings caused by vibration or quick maneuvers. All wetted parts use corrosion-resistant materials to handle ethanol blends and modern additives without degradation. This ensures drivers avoid false low warnings during steep grades or hard accelerations. The result is reliable feedback on remaining range, giving confidence on both daily drives and performance outings.
Robust Fuel Flow Supporting High Output Engines
The Walbro pump at the heart of this kit is rated for supercharged applications and naturally aspirated engines exceeding 550 horsepower, delivering ample flow for demanding power levels. Bench and vehicle testing confirm that this 400 LPH unit maintains stable pressure even under sudden throttle bursts, protecting against lean‐out at peak rpm. Generous flow margins accommodate future performance upgrades, avoiding the need for additional tank modifications. By matching pump capacity to LS and LT swap requirements, builders can trust their fuel system to meet evolving output goals without compromise.
Count on precise fuel management during every drive. For a Smaller capacity fuel pump Kit at 255 LPH see our 1968-1970 GTO / Lemans EFI Fuel Tank Kit - 255 LPH Pump.