EFI Fuel Tank Kit with 400 LPH Pump for LS/LT Swaps in 1970 Buick Skylark
Whether you are tackling an LS or an LT conversion in your 1970 Buick Skylark, this EFI Fuel Tank Kit solves fuel starvation under cornering or wide-open throttle by delivering consistent flow for engines north of 550 horsepower. Each kit bolts directly to the A Body frame using the original mounting points to preserve chassis geometry and ground clearance. Internally, strategically placed baffles and a fully immersed 400 LPH pump prevent cavitation during lateral loads and steep inclines. Installers will find that all straps, gaskets and vent filters come included for a straightforward assembly that maintains the vintage underbody profile.
Precision A Body Frame Alignment
This EFI fuel tank is engineered to drop into the original bolt hole pattern on a 1970 Skylark A Body frame without any alterations. By matching factory mounting locations, the tank preserves chassis geometry and maintains the intended ground clearance. Routing fuel lines and wiring harnesses follows the same path as the stock setup, minimizing chafing and wear over time. Installers benefit from a direct fit approach that removes the need for custom brackets or extended fabrication, keeping the installation true to the vehicle's classic underbody layout.
Immersed 400 LPH Fuel Pump Efficiency
At the heart of this kit is a Walbro 400 LPH pump that remains fully immersed to ensure uninterrupted performance even under high cornering loads. Submersion prevents cavitation during hard acceleration or steep inclines, so the pickup never draws air and starve the engine. Continuous contact with fuel also acts as a cooling medium, reducing heat soak when the pump supplies modern high-performance engine requirements. The result is consistent pressure at the injectors, reliable throttle response and stable operation for engines pushing beyond 550 horsepower.
Integrated Internal Baffles for Slosh Control
Inside the tank, a network of welded partitions manages fuel movement during rapid direction changes or sudden stops. These baffles maintain a steady supply at the pump inlet, avoiding low pressure events that lead to hesitation under load. By controlling liquid inertia, the design also cuts down on fuel surge noise and helps the sending unit deliver accurate level readings. All of this is contained within a shell that retains the classic Buick outline, delivering modern fluid management without compromising original styling cues.
Complete Installation Package with US Made Components
This kit arrives ready for assembly with every strap, gasket, filter and mounting bracket needed for a full swap. Components are sourced and manufactured in the United States to strict quality standards, ensuring consistent fitment and matched hardware threads. Packaged in logical sequence, the parts guide technicians through removal of the old tank and installation of the new module without extra trips to the supply house. The comprehensive nature of the kit limits installation time and guarantees a leak free fuel system that honors both function and form.
Count on consistent flow and precise fit in your LS and LT swap while preserving the vintage underbody look. For a Smaller capacity fuel pump Kit at 255 LPH see our 1970 Skylark EFI Fuel Tank Kit - 255 LPH Pump.