1964 Pontiac GTO EFI Fuel Tank Kit with 400 LPH Pump for LS and LT
For a 1964 Pontiac GTO switched to LS or LT power, supporting modern fuel demands is vital and this EFI fuel tank kit with 400 LPH pump is designed to meet that need. It installs in the original frame points, swapping out the stock reservoir for a fully submerged Walbro pump that maintains stable pressure during spirited runs or forced induction. Then, a calibrated sending unit replicates the factory resistance curve to preserve accurate fuel level readings without instrument calibration. Finally, the integrated vent filter and sealing gaskets form a single service module that simplifies maintenance and reduces leak points.
In Tank Walbro 400 LPH Pump Maintains Reliable Fuel Flow
By positioning the 400 LPH Walbro pump fully inside the tank, this kit leverages the surrounding fuel for active cooling and constant pressure output that meets or exceeds the demands of modern forced induction and high output LS and LT engines. Immersion prevents heat build up around the pump housing, which can cause vapor lock during prolonged high RPM operation typical of supercharged and 550 horsepower setups. This configuration also reduces mechanical noise and vibration, resulting in a quieter underbody while preserving peak flow rates on both the drag strip and winding back roads. Consistent delivery under extreme acceleration or sustained high load translates to sharp throttle response and uninterrupted engine performance. The outcome is a reliable supply of filtered fuel, regardless of G load or driving style.
Calibrated Sending Unit Preserves Stock Gauge Accuracy
The sending unit is precision calibrated at the factory to match the exact resistance curve of the original 1964 Pontiac GTO fuel system, delivering identical voltage feedback to the stock instrument cluster. Unlike generic aftermarket modules that can lead to erratic needle movement or false empty warnings, this component seamlessly replicates factory output across the entire fuel level range. Arriving preadjusted, it requires no additional tuning or gauge reprogramming-just plug it into the original wiring harness for immediate results. Drivers benefit from clear, linear fuel level readings through cornering and acceleration, ensuring they know exactly how much fuel remains at all times.
Factory Frame Point Fitment with Integrated Venting System
Engineered to mate with the existing underbody attachment points used on 1964 GTO, Lemans, and Tempest chassis, this EFI conversion tank retains the original ground clearance and profile of the classic muscle car. Every detail of the filler neck, mounting straps, and hardware mimics the stock layout, allowing installers to connect the unit without trimming panels or altering suspension components. An integrated vent filter and sealing gaskets are combined into a single service module that blocks moisture and debris from entering the system, protecting internal pump components and preserving fuel quality. This precise integration maintains a show-quality underbody appearance while delivering modern fuel delivery advantages.
Unified Service Module Simplifies Access and Maintenance
All critical components-including pump, sending unit, vent filter, and gaskets-come preassembled into one removable module, significantly reducing the number of potential leak points found in multi piece designs. A single set of fasteners releases the unit for rapid inspection or component swaps without the need to remove straps or disassemble surrounding underbody structure. Included hardware and factory style connectors guide a straightforward reconnection even in tight spaces, cutting labor time and minimizing error. Engineered and assembled in the USA to high quality standards, this unified design not only streamlines maintenance but also ensures long-term system reliability.
Count on MuscleRods for reliable modern fuel delivery and for a Smaller capacity fuel pump Kit at 255 LPH see our 1964 Pontiac GTO EFI Fuel Tank Kit - 255 LPH Pump.