EFI Fuel Tank Kit for 1965-1967 Pontiac GTO LS and LT Swaps
When integrating a modern LS or LT mill into the classic 1965 to 1967 GTO A Body chassis, consistent fuel flow becomes a critical concern and the 400 LPH EFI tank conversion answers that demand. By nesting the high flow pump inside a reservoir molded to the factory floor pan, installation avoids extra brackets and frame rail cuts. Positioned fully submerged, the pump benefits from coolant action that prevents vapor lock under heavy cornering or extended runs. Every gasket, vent filter and mounting strap is included and the reservoir material and fittings have been tested for ethanol blend compatibility and corrosion resistance to support builds up to 550 horsepower without fitment issues.
Precision Molded Reservoir for Direct A-Body Fit
The tank's custom molded shape follows the factory floor pan contours of the 1965-1967 GTO A-Body platform to ensure a snug fit without extra brackets or frame rail alterations. By aligning with original mounting points, it eliminates the common trial-and-error of aftermarket installations and reduces vibration that can loosen fittings over time. Technicians benefit from easier alignment and faster setup, channeling more time into engine calibration instead of bracket fabrication. The precise form also preserves stock ground clearance, helping maintain the classic stance and handling characteristics of the original chassis.
Submerged 400 LPH Walbro Pump for Consistent Fuel Pressure
Housing the 400 LPH Walbro pump fully inside the tank creates a constant supply of fuel around the unit, promoting thermal stability and preventing vapor lock under heavy cornering or extended high-load operation. This in-tank configuration filters out debris before it reaches the pump, extending service intervals and safeguarding sensitive injectors. Steady fuel pressure supports forced induction and naturally aspirated setups up to 550 horsepower, ensuring the engine never starves at wide-open throttle. Builders will notice crisp throttle response and uniform delivery from cold start through hard acceleration.
Ethanol Blend Compatibility and Corrosion Resistance
All materials in this assembly have been tested for tolerance to modern ethanol blends to avoid swelling or degradation that can compromise seals. The reservoir and pump housing use polymers screened for chemical resistance, while gaskets maintain sealing flexibility even after prolonged exposure. Filler neck, straps, and hardware receive anti-corrosion treatment to withstand road salts and moisture without surface rust. Manufactured under strict quality standards in the USA, these components deliver reliable performance mile after mile, whether on daily drives or long highway runs.
Integrated Kit Design Minimizes Installation Time
This all-inclusive kit provides every component needed for a seamless LS or LT swap fuel system upgrade. From the 400 LPH pump module and sending unit to tank straps, filler neck, vent filter, gaskets, and mounting hardware, nothing is left to chance. The sending unit is calibrated to work with the stock gauge cluster for accurate readings without additional wiring or adapters. By streamlining parts sourcing, installers can avoid mismatches and reduce shop hours, focusing on fine-tuning engine performance rather than chasing missing pieces.
Count on MuscleRods for consistent performance and easy installation. For the smaller capacity fuel pump Kit at 255 LPH see our 1965-1967 Pontiac GTO EFI Fuel Tank Kit - 255 LPH Pump.