1978-1988 Chevy/Pontiac G-Body EFI Fuel Tank Kit for LS and LT Swaps
This tank kit addresses the critical fueling demands of LS and LT engine swaps on 1978 through 1988 G Body Monte Carlo, Malibu and Grand Prix models. It mounts directly to factory frame rails and houses a self-contained pump module featuring a 400 LPH Walbro pump that delivers stable flow during spirited cornering and extended highway runs. Precision stamped flanges align with original fuel lines and vent hoses to simplify installation without trimming or fabrication. The sealed standpipe pickup prevents vapor lock under heavy load while preserving throttle response for powered LS and LT builds.
Engineered Fitment for 1978 to 1988 G Body Fuel Rails
This fuel tank kit is precision stamped to match the original frame rails on Monte Carlo, Malibu and Grand Prix chassis from 1978 through 1988. By retaining the factory mounting points and flange geometry, it seats flush without the need for any cutting or welding. Maintaining the stock clearance protects suspension travel and ensures the filler neck and vent hoses align perfectly with existing lines. Installers benefit from a true bolt-in solution that preserves underbody geometry and accelerates the swap process.
Integrated In Tank Pump Module Preventing Vapor Lock
At the heart of this assembly lies a 400 LPH Walbro fuel pump housed inside a sealed standpipe, which isolates the pickup from fuel slosh during hard launches or spirited cornering. Locating the pump in the tank minimizes heat soak and air ingestion, two common causes of vapor lock in high-demand EFI applications. The constant supply of fuel ensures smooth throttle response on LS and LT engines even under supercharged loads exceeding 550 hp. Cooler operating temperatures and reduced cavitation also extend pump service life, keeping performance consistent mile after mile.
Comprehensive EFI Conversion Package Reducing Installation Time
Rather than sourcing individual parts, this kit includes all critical components: the in-tank pump module, sending unit, filler neck, vent filter, tank straps, gaskets and hardware. Each piece is engineered to work together, eliminating the need for adaptors or custom brackets. Detailed instructions guide users through mounting, plumbing and wiring in logical steps, cutting hours off the typical installation. The result is a clean, leak-free system that lets builders focus on tuning and driving rather than parts procurement.
Count on MuscleRods for consistent performance. For a smaller capacity fuel pump Kit at 255 LPH, consider our 1978-1988 Monte Carlo 255 LPH pump Tank Kit.