LS and LT Swap Fuel Tank for 1978-1988 G-Body Monte Carlo Malibu Grand Prix
If your project involves installing an LS or LT engine in a 1978-1988 Chevrolet Monte Carlo, a 1978-1983 Chevrolet Malibu or a 1978-1987 Pontiac Grand Prix, the 1978-1988 Monte Carlo, Malibu, Grand Prix EFI Fuel Tank Kit is compatible with LS and LT engines and features a 400 LPH Walbro pump designed for supercharged or over 550 horsepower setups. Integrated in the fuel tank for EFI conversions, this self-contained module ships complete with sending unit, tank straps, filler neck, vent filter, gaskets and installation hardware. Its robust durable construction and manufacture in the USA ensure reliable service under demanding operating conditions.
Optimized Fuel Delivery
The kit centers on a 400 LPH Walbro fuel pump designed to support supercharged installations or any engine exceeding 550 hp. By delivering a consistent volume at high demand, the system maintains stable pressure under full load, which prevents lean conditions and protects critical engine components. This level of performance ensures that both LS and LT powerplants receive the precise fuel flow needed for peak output, whether you're launching from the line or cruising at speed. The result is a direct response to throttle input, steady power delivery across the entire rev range, and reduced risk of fuel starvation in extreme driving scenarios.
Integrated Pump Module
The reservoir features a fully integrated pump module housed within the tank body for modern EFI conversion setups. This arrangement simplifies installation by combining the filter, pump, and level sensor into a single assembly, eliminating multiple external lines and reducing the chance of leaks. Placement inside the tank also uses the fuel itself for cooling the pump motor, which extends service life and maintains consistent operating temperatures. Together, these elements deliver clean, pressurized fuel without the need for additional brackets or adapters beyond the supplied hardware.
Targeted G-Body Fitment
Engineered specifically for 1978–1988 Monte Carlo, 1978–1983 Malibu, and 1978–1987 Grand Prix G-Body models, this fuel tank kit replaces the original steel unit with a custom-molded polyethylene reservoir that matches factory mounting points. MuscleRods quality control ensures each item aligns precisely with the vehicle frame, preserving proper chassis geometry and drivetrain angles. Built in the USA from impact-resistant materials, the assembly resists corrosion and road debris. With a focus on reliability, it delivers years of trouble-free operation in restoration projects and high-power builds alike.
This fuel tank kit features a 400 LPH pump for steady flow under high demand, making it an ideal LS or LT swap solution. To complete your Smaller capacity fuel pump Kit at 255 LPH, consider our 1978-1988 Monte Carlo 255 LPH pump Tank Kit.