1978-1988 Monte Carlo Malibu Grand Prix EFI Fuel Tank Kit for LS and LT Swaps
When you install a modern LS or LT engine in a 1978-1988 Monte Carlo, Malibu or Grand Prix, maintaining consistent fuel delivery under track and highway stresses becomes a top priority. Mounting directly to the factory frame rails, this EFI fuel tank kit houses a 400 LPH Walbro pump inside the tank and retains original flange geometry for precise fuel and vent line alignment. A sealed standpipe pickup isolates the pump inlet from fuel slosh to prevent vapor lock during hard cornering and supports builds that exceed 550 horsepower. Installation requires no cutting or welding thanks to the factory mounting points and clear instructions, letting you shift your project off the bench and onto the road with confidence.
Precision Engineered Fit for 1978 to 1988 Monte Carlo Malibu and Grand Prix
This fuel tank kit is stamped to match the factory frame rails on 1978 through 1988 Monte Carlo, Malibu and Grand Prix models, ensuring an exact fit without any cutting or welding. Retaining the original flange geometry allows precise alignment of fuel and vent lines, preserving underbody clearance and suspension travel. The design mirrors factory mounting points so the installation process feels like an OE replacement rather than a custom fabrication project. Builders can rely on consistent positioning of the tank and hardware, reducing the risk of clearance interference with exhaust components or brake lines. By upholding the chassis integrity and original specifications, this kit streamlines EFI engine swaps and maintains the classic profile of the G Body platform.
Integrated In Tank 400 LPH Pump for Consistent Fuel Delivery
Featuring a 400 LPH Walbro pump housed entirely within the tank, this system minimizes air ingestion and lowers operating temperature to prevent vapor lock under heavy cornering or rapid acceleration. An internal standpipe pickup isolates the pump inlet from fuel slosh, maintaining constant head pressure and enabling instant throttle response even on builds exceeding 550 horsepower. Cooler running conditions also reduce cavitation and extend service intervals, so owners spend less time on maintenance and more time driving. Mounting the pump internally eliminates external modules and complex plumbing, reducing the number of fittings and potential leak points. This integration delivers smooth fuel flow whether you're on the highway or navigating a road course.
Complete EFI Fuel System Kit for Simplified Installation
This all-inclusive assembly brings together every component needed for a seamless EFI conversion: sending unit, filler neck, vent filter, tank straps, gaskets and hardware are precisely matched for this application. With no need for adapters or custom brackets, each piece fits directly to the fuel tank or frame rail using original mounting holes. Detailed instructions guide builders through mounting, plumbing and wiring, reducing guesswork and installation time. All components are proudly made in the USA to ensure consistent quality and support domestic manufacturing. The result is a leak-free system that cuts downtime and dispatches your project from bench test to roadworthy status with confidence.
For a Smaller capacity fuel pump Kit at 255 LPH see our 1978-1988 Monte Carlo 255 LPH pump Tank Kit.