EFI Fuel Tank Kit with 255 LPH Pump for 1973-1987 GM C/K LS Swaps
Fitting an LS fuel injected engine into a 1973 to 1987 GM C10 or K15 pickup often demands careful packaging of the supply system under a six foot bed, and this EFI fuel tank kit with a 255 LPH pump resolves that challenge with precision mounting. By using factory frame points on C10 C15 K10 and K15 chassis no cutting or fabrication is needed, preserving the original drive shaft angle. Positioning the Walbro unit fully submerged maintains constant flow up to 550 horsepower under all driving conditions. OEM style vent filters and precision cut gaskets ensure a leak free seal while supporting smooth throttle response and lasting reliability.
Direct Fitment for 1973 to 1987 GM Six Foot Bed Trucks
This EFI tank kit is engineered to match the underbody profile of 1973 to 1987 C10, C15, K10 and K15 pickups, allowing a bolt-in installation without altering the floor pan. By using the factory mounting locations and provided straps, installers avoid cutting or fabricating custom brackets, preserving the original frame rails and ride height. The precise alignment retains the driveshaft angle and prevents interference with suspension or exhaust components. This approach reduces labor time and ensures that the chassis integrity remains intact during LS engine integration.
Fully Submerged 255 LPH Walbro Pump for Constant Flow
Central to the kit's performance is the Walbro pump module rated at 255 liters per hour, capable of supporting up to 550 horsepower. Mounting the unit completely below the fuel level eliminates cavitation risks during hard acceleration or steep inclines and minimizes fuel temperature rise for consistent pressure. With the pump drawing directly from the reservoir, pressure spikes and lean conditions are prevented, safeguarding engine internals. This design also extends pump service life, since it operates in a cool, stable environment.
Factory Style Vent Filtering and Leak Free Sealing
Maintaining proper venting and a secure seal are critical for EFI systems, and this kit delivers both with OEM-pattern components. The vent filter replicates original flow characteristics to keep moisture and debris out while allowing air to escape as fuel level changes. Precision cut gaskets ensure a flawless seal between the module, filler neck and tank body, eliminating leaks even under varying thermal cycles. All included hardware is manufactured in the USA to tight tolerances, providing long term containment and reliable pressure control.
Seamless Compatibility with 4L60E and 4L80E Transmissions
This fuel tank assembly maintains the stock pump height and location, preserving the transmission tunnel clearance for both 4L60E and 4L80E gearboxes. Builders can install the system without modifying crossmembers or adding spacers, which helps maintain proper pinion angle and reduces driveline vibration. The unchanged mounting geometry also ensures consistent shaft alignment and minimizes wear on u-joints and bearings. By integrating smoothly with common GM automatic transmissions, the kit supports a clean, professional LS swap installation.
To step up to a Larger capacity fuel pump Kit at 400 LPH see our 1973-1987 GM Truck EFI Fuel Tank Kit - 400 LPH Pump - 6' bed. MuscleRods support ensures smooth integration.