LS and LT Fuel Tank Kit for 1978-1987 Buick Regal and Grand National G-Body
When fitting an LS or LT engine into a Buick Regal or Grand National G-Body chassis from 1978 through 1987 fuel delivery can become the weakest link and the EFI tank kit with a 400 LPH pump addresses that challenge. It pairs a Walbro 400 LPH unit with an integrated sending mechanism to sustain pressure above 550 hp applications and provide accurate level feedback whether cruising or under boost. Installers benefit from direct fitment to factory mounting points so no custom brackets are needed. Consistent supply and precise monitoring support responsive throttle behavior and give tuners the confidence to push timing or boost curves without fearing lean spikes.
400 LPH Walbro Pump Ensuring Stable Fuel Supply
The heart of this EFI fuel tank kit is the 400 LPH Walbro pump, engineered to maintain consistent pressure even under peak demand. By supplying fuel at a steady rate during wide open throttle and forced induction, it guards against lean conditions that can damage pistons and valves. The pump's capacity to support engines exceeding 550 horsepower offers builders confidence when dialing in boost levels or advanced timing curves. With its robust design, this unit delivers reliable flow for spirited acceleration and sustained high-speed cruising.
Integrated Sending Unit for Precise Level Monitoring
An in-tank sending mechanism is incorporated directly into the assembly, providing accurate fuel level feedback to the factory gauge. This integration reduces float arm travel and eliminates phantom readings that can result from aftermarket adapters. Calibration is matched to the original instrument cluster, so the needle movement remains smooth and predictable across all tank conditions. Consistent level data helps drivers avoid unexpected refuels and supports precise trip planning for long runs or track sessions.
Complete Kit Design Simplifying G Body Installations
This fuel tank kit bolts into the stock mounting points on 1978 through 1987 Buick Regal and Grand National chassis, eliminating the need for custom support brackets or major modifications. All necessary hardware is included, from straps and gaskets to filler neck components and a vent filter, ensuring each part aligns correctly on drop-in assembly. Builders save hours of bracket fitting and trial alignment, preserving underbody clearance and maintaining structural integrity. The streamlined process lets installers focus on wiring and tuning rather than tank placement.
EFI Conversion Delivering Responsive Throttle and Improved Efficiency
Transitioning from a mechanical setup to electronic fuel injection unlocks finer control of pump operation under varying engine loads, speeds, and temperatures. The ECU can modulate fuel pressure to match demand, sharpening throttle response at low rpm and optimizing fuel use at cruise. Precise pulse width control during cold starts reduces flooding and spiking, protecting spark plugs and catalytic components from fouling. Drivers benefit from a smoother power curve and enhanced fuel economy across diverse driving conditions.
Count on reliable fuel delivery for your G Body conversion. For a smaller capacity fuel pump Kit at 255 LPH see our 1978-1987 Buick Regal 255 LPH pump Tank Kit.