1978-1987 Buick G-Body Regal/Grand National EFI Fuel Tank Kit for LS and LT Swaps
For professionals undertaking LS and LT powerplant swaps in Buick Regal and Grand National G Body chassis built from 1978 to 1987, the 1978-1987 Buick Regal EFI Fuel Tank Kit 400 LPH Pump addresses the critical demand for consistent fuel pressure under high output conditions. Featuring a 400 liter per hour Walbro fuel pump mounted inside an in tank module and rated for applications over 550 horsepower including supercharged setups, this kit pairs with a precision fuel sending unit calibrated to match factory gauge output. All tank straps, filler neck, vent filter, gaskets and installation hardware are included for bolt in installation reducing complexity and downtime.
Overview and Compatibility
The 1978–1987 Buick Regal EFI Fuel Tank Kit with 400 LPH Pump is engineered to support LS and LT powerplants in classic Regal chassis. This assembly is tailored to fit the factory mounting points for those model years without modification to the frame. Precision manufacturing and calibrated dimensions ensure that the tank seats securely in the original location. When used with MuscleRods mounts, the system maintains proper engine placement and correct drivetrain angles, preserving handling balance and minimizing stress on suspension components.
Performance and Delivery
At the heart of this kit lies a high-flow 400 LPH Walbro fuel pump designed to sustain consistent pressure under demanding conditions. It supports applications over 550 horsepower, making it ideal for supercharged configurations and high-output builds. The robust pump architecture resists wear from extended high-duty operation, reducing the risk of fuel starvation during hard acceleration or sustained track use. By converting to electronic fuel injection, drivers will experience sharper throttle response and improved fuel economy compared to carbureted setups.
Installation and Monitoring
Installation is simplified by a modular design that reduces mechanical complexity and cuts downtime. All mounting hardware and gaskets are included, and the unit aligns with the stock filler neck and vent fittings. A precision fuel sending unit is integrated for accurate level readings, delivering consistent gauge performance under cornering and heavy braking. This kit also retains compatibility with emission control plumbing present on later model variants, offering a straightforward path for restoration or performance upgrades.
For a smaller capacity fuel pump kit at 255 LPH, consider our 1978-1987 Buick Regal 255 LPH pump Tank Kit.