1964 Pontiac GTO LS and LT EFI Fuel Tank Kit with 400 LPH Pump
Upgrading to a modern LS or LT setup in a 1964 Pontiac GTO often hits a roadblock when the original tank cannot sustain steady flow during hard acceleration and spirited driving, and this EFI fuel tank kit solves that by integrating a Walbro 400 LPH pump into a direct tank replacement. It mounts using the factory points so the unmodified underbody retains its classic look while delivering consistent pressure to support supercharged applications or engines making 550 plus hp. Positioning the pump inside the tank ensures continuous cooling to prevent heat related drop in pressure during sustained high RPM operation. Beyond pump capacity, the calibrated sending unit mirrors stock gauge output to provide accurate fuel readings without guesswork or surprises while the vent filter and sealing gaskets guard against debris and moisture.
Precision Calibrated Sending Unit for Factory Gauge Performance
The sending unit in this fuel tank kit is engineered to replicate the exact resistance curve of the original 1964 Pontiac GTO gauge. By matching stock output, drivers receive dependable fuel level readings under every driving scenario, eliminating the guesswork that can accompany aftermarket conversions. The module's precision calibration ensures the needle response remains linear, preventing sudden swings when fuel moves under spirited acceleration. This accuracy not only safeguards against unexpected empty tank warnings but also preserves the classic cabin experience. Technicians will appreciate that the sending unit arrives pre adjusted and ready for immediate installation, keeping setup time to a minimum.
Submerged Pump Cooling Ensuring Steady Delivery
At the core of this kit is a 400 LPH Walbro pump mounted fully inside the tank where fuel circulates around it, continuously cooling internal components. This design prevents heat soak that often causes pressure drop in high output or supercharged LS and LT engines. During extended high rpm operation, the submerged configuration maintains consistent flow, preserving throttle response and preventing vapor lock. Enthusiasts running 550 plus horsepower setups benefit from uninterrupted fuel supply, even during burnouts or long drag strip passes. The result is unwavering pressure that keeps injectors fed precisely regardless of load.
OEM Style Fit Preserving Classic Underbody Lines
This fuel tank kit was designed to bolt directly into the existing frame points of a 1964 Pontiac GTO, Lemans, or Tempest without any alteration to the chassis or suspension. The filler neck, mounting straps, and hardware mirror the original geometry so that installation maintains the factory underbody appearance. Owners can carry on with other swap tasks without modifying the subframe or crossmembers, preserving resale value and show quality. Even the vent filter and sealing gaskets align with stock dimensions, preventing clearance issues. The OEM style integration allows for a clean look that honors the car’s heritage.
Integrated Module Design Streamlining Service Access
This kit unites the fuel pump, sending unit, vent filter, and gaskets into a single modular assembly that installs and removes as one piece. By consolidating these elements, potential leak points are minimized and routine maintenance becomes far more efficient. A single set of fasteners releases the entire module, reducing downtime for filter changes or pump upgrades. Pre routed electrical connectors and hardware further simplify service procedures, even in confined quarters under the vehicle. The cohesive design philosophy keeps the system sealed and reliable while delivering straightforward access for future servicing.
For a smaller capacity fuel pump kit at 255 LPH see our 1964 Pontiac GTO EFI Fuel Tank Kit - 255 LPH Pump. Count on precise fit and steady performance with this fuel tank.