1971-1972 Chevy Monte Carlo LS EFI Fuel Tank Kit with 400 LPH Pump
When swapping an LS engine into a 1971 to 1972 Chevy Monte Carlo A Body chassis the stock fuel system often falls short under high boost and sustained load so the 1971 to 1972 Monte Carlo EFI Fuel Tank Kit with 400 LPH Pump delivers a drop in reservoir engineered for modern EFI demands. Inside the custom tank a submerged 400 LPH Walbro unit minimizes vapor lock and prevents aeration during hard cornering or heavy acceleration by remaining cooled beneath fuel level. A built in vent filter preserves constant pressure and a precision level sender provides accurate gauge readings across varied driving conditions. Complete mounting hardware and detailed instructions ensure exact frame rail fitment with no cutting or major fabrication required for street or track LS conversions.
Precision Placement of the 400 LPH Fuel Pump
The kit installs a 400 LPH Walbro pump fully submerged in the reservoir to deliver steady high volume flow under extreme driving conditions. Mounting the pump beneath the fuel level greatly reduces the chance of vapor lock by keeping it cool and fully covered during cornering. This arrangement also cushions the unit against road induced vibration and noise, improving longevity and smoothing output during rapid throttle changes. Additionally, the internal placement simplifies line routing, cutting down on bends and fittings that can create pressure loss. As a result, the system reliably supports supercharged engines or those exceeding 550 horsepower without interruption.
Coordinated Vent Filter and Precision Fuel Level Sender
By integrating a vent filter directly into the tank housing, the design prevents air from entering under heavy acceleration or sudden braking, maintaining stable pressure for consistent flow. Coupled with a calibrated level sender, drivers benefit from accurate gauge readings regardless of fuel level or lateral forces. This coordination helps avoid false low fuel warnings that can occur when fuel sloshes away from the sender pickup. Keeping the tank properly vented also shields the pump from dry running, preserving its efficiency and extending service intervals. Together, these features deliver predictable performance whether on the street or the track.
Purpose Built Drop-In Tank for 1971 to 1972 Monte Carlo
Each metal reservoir is shaped to fit precisely between the original frame rails of the Monte Carlo A Body chassis without requiring cutting or fabrication. The contours align with factory mounting points to preserve the vehicle underbody appearance and ensure a secure fit. Included mounting straps, filler neck components, and sealing gaskets attach seamlessly, reducing labor time and potential alignment issues. Detailed step by step instructions guide technicians through stock tank removal and installation, making the swap accessible for shops of all skill levels. The result is a sleek undercarriage that retains its factory look while providing modern fuel delivery capabilities.
Comprehensive Kit with All Necessary Installation Components
This fuel tank package arrives complete with every part needed for a seamless upgrade, eliminating the need to source extra hardware. The pump module and sending unit are preassembled, while tank straps, vent filter, filler neck, gaskets, and mounting bolts are sorted into clearly labeled bags. A detailed parts list within the instructions ensures no item is overlooked and clarifies the correct installation sequence. Supplying matched components reduces the risk of leaks and improvisations that can lead to system failures. Overall, this comprehensive approach streamlines the swap process and minimizes downtime on both street and performance builds.
This kit ensures steady EFI supply for LS swaps. For a smaller capacity fuel pump kit at 255 LPH, see our 1971-1972 Monte Carlo EFI Fuel Tank Kit - 255 LPH Pump.