LS EFI Fuel Tank Kit for 1970-1972 Oldsmobile Cutlass A-Body with 255 LPH Pump Notched
When fitting an LS engine into a 1970-1972 Cutlass A-Body chassis, tight frame rails and modern exhaust packages often collide with the stock tank. This notched kit carves a precision relief into the rear wall to clear larger headers and wider tires without altering the floor pan. Inside, a 255 LPH Walbro pump maintains steady flow for engine builds up to 550 horsepower under hard cornering and sustained loads. Complete with factory matched straps, sending unit, filler neck and mounting hardware aligned to stock openings, the package provides a direct fit solution for LS EFI applications.
Reinforced Notch Geometry for Exhaust and Tire Clearance
The tank shell incorporates a precision sculpted relief in the rear wall that clears larger headers and wider tires without altering the original floor pan. Edges around the relief are reinforced with additional material thickness to resist flex and fuel slosh during cornering. This approach preserves full capacity and structural integrity under chassis twist while enabling modern exhaust routing and aggressive tire widths. By balancing clearance needs with reinforcement, the design ensures ground height and volume remain consistent even under hard acceleration and sustained track use.
Immersive 255 LPH Pump Design for Temperature Stable Flow
The in tank module positions the 255 liter per hour Walbro pump fully below the fuel level for continuous cooling that prevents vapor formation and cavitation. This immersion cooling stabilizes internal temperatures during prolonged high rpm operation and reduces the risk of dry running under heavy load. Placing the pump inside the tank also dampens noise and vibration compared to an external unit, creating a quieter driving environment. It delivers a consistent pressure output that meets engine demands up to 550 horsepower in both street and track conditions.
OEM Matched Components for Leak Free Direct Fit Integration
Every seal and fastener in the kit matches original thread sizes and opening dimensions found in 1970 to 1972 Oldsmobile Cutlass chassis, eliminating modifications and sourcing delays. The sending unit, filler neck and vent filter align precisely with factory holes, while the tank straps and gaskets secure the assembly without altering mounting points. This attention to detail produces a perfect seal that prevents leaks and corrosion, preserving fuel system reliability. Installers gain confidence that all parts work in harmony to uphold ground clearance and chassis appearance.
Guided Home Installation That Preserves Chassis Dynamics
Preformed straps and locating tabs guide the tank into the correct position, maintaining the factory ride height and ensuring proper alignment of fuel lines to the engine bay. The drop in replacement process requires no frame rail cutting or welding, making it ideal for enthusiasts working with basic tools in a home garage. Clear mounting points and included hardware reduce the risk of error and speed up the assembly. The result is a clean fit that retains the original driving feel and structure of the chassis.
To complete your upgrade with a Larger capacity fuel pump Kit at 400 LPH, check out our 1970-1972 Cutlass 400 LPH pump Tank Kit (notched). Count on MuscleRods for a precise secure installation.