1967 Chevrolet Impala EFI Fuel Tank Kit with 255 LPH Pump
If you are swapping an LS or LT engine into a 1967 Impala this EFI fuel tank kit with a 255 LPH pump solves the stock supply shortfall and meets the demand of modern powerplants. Designed to deepen the sump by three quarters of an inch and shorten overall length by five inches it drops cleanly into the factory rails without any trimming yet gains extra capacity for longer runs between fill ups. Constructed from corrosion resistant stainless steel and featuring an integrated sending unit the assembly positions the Walbro pump lower in the bowl to ensure EFI fuel delivery remains uninterrupted during hard acceleration or sustained cornering.
Precision Sump Geometry for Stable EFI Supply
At 3/4 inch deeper than the original tank and trimmed by five inches from front to back, the redesigned sump adapts to the 1967 Chevrolet Impala B-body chassis while preserving ground clearance. Its specific bowl shape guides fuel toward the inlet screen with minimal swirl, reducing vapor formation and preventing air ingestion at cornering forces. By situating the Walbro pump low in the fuel pool, the system maintains consistent EFI fuel delivery even when lateral acceleration shifts the fuel mass. The shorter profile aligns with factory mounting points, eliminating the need for modifications to straps or floors and simplifying the retrofit. Such geometric precision is vital when running modern power outputs up to 550 horsepower reliably on street or track.
Integrated Module Simplifying Fuel System Installation
All key components including the fuel pump, sending unit, vent filter and mounting hardware are combined into a single assembly that drops into the original tank location without extra fabrication. This unified module reduces hose routing, gaskets and leak points, so installers can rely on the correct seal and fit using existing holes in the frame rails. With the filler neck and straps included, even enthusiasts with modest tool sets can complete the swap without adapting aftermarket parts. The clear layout under the rear seat keeps lines contained and accessible, streamlining future maintenance and diagnostics. As a result, both restoration experts and first time mechanics benefit from a straightforward bolt in application that mirrors OEM simplicity.
Corrosion Proof Stainless Steel for Lasting Performance
Fabricated entirely from premium stainless steel, the tank withstands ethanol blended fuel and corrosive road treatments without pitting or rust. Weld seams are executed with precision to form a sealed chamber that resists flex fatigue and vibration typical of B-body frames. Inside surfaces remain smooth to prevent debris buildup around the pump inlet, extending service intervals for in line filters. The exterior finish sheds moisture and road grime, minimizing the need for frequent cleaning while preserving material integrity. Over years of use, this choice of metal construction delivers reliable service and reduces the risk of fuel leaks or tank failure.
Submerged Pump Placement Enhancing Cooling and Quiet Operation
Positioning the 255 LPH Walbro pump fully inside the tank allows the surrounding fuel to act as a cooling medium, which prevents the overheating issues common to remote pump mounts. By maintaining a stable thermal environment, the assembly keeps fuel density consistent and supports precise injector flow under high engine load. Immersion also isolates mechanical noise, making pump operation barely audible inside the cabin during acceleration or cruising. This design choice ensures that fuel delivery remains uninterrupted during prolonged high speed runs and spirited cornering, supporting both driver confidence and engine performance.
Count on MuscleRods for a precise fit and lasting performance; for the same fuel tank but with a 400LPH pump see our 1967 Impala EFI Fuel Tank Kit - 400 LPH Pump.