1978-1988 G-Body LS and LT Fuel Tank Kit for Monte Carlo Malibu Grand Prix
If you are tackling an LS or LT engine swap in a Monte Carlo, Malibu or Grand Prix from 1978 to 1988, this EFI fuel tank kit with a 400 LPH Walbro pump streamlines fuel delivery under demanding conditions. Mounting directly to factory frame rails retains original flange geometry for precise fuel and vent line alignment while a sealed standpipe pickup prevents vapor lock during aggressive cornering. Installation uses mounting points and clear instructions so no cutting or welding is required letting you focus on finishing your G Body build. Built to support engines exceeding 550 horsepower, the tank's integrated pump housing and steel construction minimize external plumbing and leak points, ensuring consistent fueling and reduced maintenance on high output applications.
Sealed In Tank Fuel Pump Ensures Consistent Delivery
The 400 LPH Walbro pump is fully enclosed within the tank interior to reduce air ingestion and maintain stable inlet pressure under extreme cornering. A sealed standpipe pickup isolates the pump inlet from fuel slosh, preventing vapor lock during rapid acceleration or spirited driving. By operating at lower temperature and avoiding cavitation, the pump supports engines exceeding 550 horsepower with immediate throttle response. Internal placement also eliminates external fittings and potential leak points, yielding a more reliable fuel system. This configuration delivers smooth and consistent flow whether on the street or a road course.
Precision Fit with Factory Frame Rail Mounting
Designed to match the original mounting points on 1978 through 1988 Monte Carlo, Malibu and Grand Prix chassis, the tank installs without any cutting or welding. The factory reference geometry ensures exact alignment of fuel and vent lines, preserving underbody clearance and suspension travel. Builders benefit from a direct fit that feels like an original equipment replacement, reducing clearance checks around brake lines and exhaust components. This precision fit maintains structural integrity and the classic profile of the G Body platform, allowing focus on the engine swap rather than frame modifications.
All Inclusive Kit Streamlines EFI Conversion Process
This comprehensive assembly combines the pump, sending unit, filler neck, tank straps, vent filter, gaskets and installation hardware in a single package. Each component is precisely matched to work together and attach to the frame rail using the factory holes, eliminating the need for adapters or custom brackets. Clear instructions guide through mounting, plumbing and electrical hook up to reduce guesswork and installation time. Proudly made in the USA, the kit upholds high quality standards and supports domestic manufacturing. The result is a leak free and fully functional EFI system that expedites project completion.
Durable Steel Tank Construction for Longevity
The fuel tank is formed from heavy gauge steel that resists corrosion and maintains shape under road and track stresses. Precision welding at critical seams and reinforced mounting flanges ensure a leak free seal and reliable service life. The robust design withstands repeated thermal cycles from fuel heating and cooling and resists impact from debris or road imperfections. Combined with internal pump housing, the single piece steel assembly minimizes potential failure points and simplifies future maintenance. This structure endures high output engine demands and harsh driving conditions.
Count on MuscleRods for precise fit and consistent performance. For a smaller capacity fuel pump Kit at 255 LPH see our 1978-1988 Monte Carlo 255 LPH pump Tank Kit.