1968-1969 A-Body Cutlass/Skylark EFI Fuel Tank Kit for LS and LT Swaps
Installing a modern LS or LT powerplant into a 1968-1969 Cutlass or Skylark chassis demands a fuel tank that avoids suspension and exhaust interference while delivering steady flow. This notched steel tank matches the factory well profile for a precise fit without chassis alterations. It houses a 400 LPH Walbro pump inside the reservoir to keep lines short and fuel cool under heavy throttle and supports engines up to 550 hp. Complete straps, gaskets and fittings are included so installers can finish the job without hunting extra components.
Purpose Built for LS and LT Powerplant Swaps
This fuel tank kit is engineered specifically for installers fitting LS or LT engines into 1968–1969 Cutlass and Skylark chassis, preserving the original fuel well geometry without modifying the frame. The notched steel body mirrors factory contours to maintain clearance for rear suspension arms and exhaust pipes, eliminating the need for trimming or weld-in brackets. By matching the stock floor pan profile, the tank sits level and avoids contact with moving components, preserving ride height and ground clearance under load. Precise alignment reduces stress on mounting points and prevents fatigue cracks often seen when ill-fitting tanks rub against chassis rails. Installers can rely on drop-in placement for consistent positioning and simplified leveling adjustments during assembly.
Optimized In Tank Pump Placement for Consistent Pressure
Integrating the 400 LPH Walbro pump inside the reservoir leverages the surrounding fuel as a natural coolant, keeping internal temperatures lower than external mounting alternatives. This design slows motor wear and delays the onset of vapor lock when engines operate at high load or ambient temperatures soar. Shorter fuel lines between tank outlet and engine regulator cut pressure losses and reduce the number of fittings, which means fewer potential leak points in EFI plumbing. The integrated module provides swift throttle response, delivering steady flow through rapid transitions and preventing starvation during spirited driving or track stints. By centralizing the pump, routing becomes more straightforward within the Cutlass and Skylark frame rails, avoiding external brackets and custom mounting solutions.
Comprehensive Kit Design Reduces Installation Time
Every element required for a complete EFI conversion comes packaged in this kit, from the in-tank pump module and sending unit to straps, filler neck, vent filter, gaskets and all mounting hardware. Each part is pre-matched to the existing openings and frame mounting locations of the A Body chassis, so there’s no need to hunt for adapters or fabricate custom brackets. Preformed gaskets ensure leak-free seals at the filler neck and sending unit, while precision-bent straps conform to the factory frame rails for secure retention. This coordinated approach streamlines workflow, allowing technicians to follow a predictable sequence of steps and complete the swap without sourcing extra components. Builders benefit from reduced fitment guesswork and a single package that addresses every connection point in the fuel system.
Reinforced Steel Structure with Protective Finish
Fabricated from heavy gauge steel, the tank resists dents and deformation caused by road vibration and track impacts, safeguarding fuel integrity over thousands of cycles. Critical seams feature reinforced weld beads that maintain structural stability under pressure changes and repeated fill-drain events common in high-output applications. A corrosion-resistant finish sheds moisture and stands up to ethanol blends, preventing rust from forming on bare metal surfaces. This rugged construction supports LS and LT powerplants up to 550 horsepower, giving builders confidence in long term durability whether on the street or at the track. The result is a stable fuel reservoir that holds shape, maintains capacity and secures reliable mounting in demanding swap environments.
Count on consistent flow and precise fit with this fuel tank kit. For a Smaller capacity fuel pump Kit at 255 LPH see our 1968-1969 Cutlass 255 LPH pump Tank Kit (notched).