1966-1967 X-Body Chevy II/Nova LS EFI Fuel Tank Kit with 400 LPH Pump
When performing an LS engine swap in a 1966 to 1967 Chevy II or Nova chassis, maintaining uninterrupted fuel flow at high rpm is critical, and this EFI fuel tank kit meets that requirement with its 400 LPH pump assembly. The precision stamped steel shell fits the factory undercarriage profile and retains original mounting points to preserve ground clearance, while immersion cooling prevents vapor lock during sustained throttle loads. An integrated fuel level sending unit arrives precalibrated for direct connection to modern EFI controllers, delivering accurate tank readings without the need for adapter harnesses. The added fuel capacity also extends drive range and supports engines above 550 hp under demanding conditions.
Robust Steel Shell Engineered for X Body Precision
The fuel tank's shell is crafted from heavy gauge stamped steel to match the exact undercarriage contours of 1966 and 1967 Chevy II and Nova X Body frames. This precise forming process preserves all original mounting points and factory straps so ground clearance remains unchanged and no custom brackets or welding are required. A factory style finish on the steel also offers reliable protection against modern ethanol blends, minimizing corrosion and extending the life of the tank under daily driving and spirited runs. Internal volume has been increased to give extra driving range without altering body lines, making it possible to enjoy long trips and track outings with fewer stops. By combining durability with a direct fit design, this shell delivers strength and convenience in one integrated package.
Immersion Cooling Technology for Consistent Flow
Positioning the 400 LPH Walbro electric pump fully submerged inside the tank turns the surrounding fuel into an efficient heat sink to lower operating temperature and prevent vapor lock under high engine loads. This method of thermal management is vital for LS swaps producing more than 550 hp, where steady volume delivery at high rpm is nonnegotiable. Internally, precision electric components maintain repeatable flow rates while vibration damping mounts absorb chassis shake and reduce noise. The result is a robust supply of fuel that resists cavitation and pressure drop during extended acceleration or sustained track sessions. Consistency in fuel pressure ensures tuning targets remain stable and engine performance does not falter when demands peak.
Pre Calibrated Fuel Level Sending Unit for Accurate Monitoring
The integrated sending unit arrives factory calibrated for direct connection to today's EFI controllers and dash displays, eliminating guesswork and the need for adapter harnesses. From installation onward it provides true fuel level feedback, preventing false low tank warnings and keeping gauge readings in sync with actual volume. Sealed electrical connectors protect against moisture ingress and road debris, preserving signal integrity over tens of thousands of miles. This attention to reliable feedback reduces troubleshooting time and supports quicker diagnostics when service is required. Technicians and DIY builders alike benefit from plug and play integration that simplifies wiring and ensures fuel management remains precise.
Complete Kit Layout Simplifies LS Swap Installation
This all in one kit includes the 400 LPH pump module, calibrated sender, tank straps, filler neck, vent filter, sealing gaskets and all necessary mounting hardware for a full fuel system upgrade. A clear installation guide walks users through tank removal, assembly steps and reinstallation using existing crossmember clearances and factory brackets, so no specialty tools or extra parts are needed. By grouping every element in one package, builders can reduce labor hours and avoid multiple trips to parts suppliers. The organized layout and detailed instructions make the swap process smoother for first time installers and experienced fabricators alike. Ultimately, this kit streamlines the path to a reliable EFI fuel supply in classic Chevy II and Nova LS applications.
Trust MuscleRods for refined fit and lasting reliability. To support a Smaller capacity fuel pump Kit at 255 LPH consider our 1966-1967 Chevy II EFI Fuel Tank Kit - 255 LPH Pump.