1968-1970 Pontiac GTO/Lemans A-Body EFI Fuel Tank Kit for LS Swaps
Planning an LS swap into your 1968 to 1970 Pontiac GTO or Lemans often comes with worries about tank clearance and fuel delivery; the 1968 to 1970 GTO and Lemans EFI fuel tank kit with a notched lower shell and a 255 LPH pump was designed to clear exhaust pipes and rear suspension travel. Inside the shell, the 255 LPH pump remains fully submerged to avoid air ingestion during hard launches or tight cornering. Mounting brackets match original A Body chassis points so installers can drop the tank in without trimming or adapters. With flow rates to support 550 horsepower, this assembly lets builders focus on tuning instead of fuel worries.
Precision Notched Geometry for Exhaust and Suspension Clearance
The tank body has been engineered with a carefully shaped notch that clears both exhaust headers and rear tire movement without altering the stock chassis profile. This cutaway preserves critical space under the car, eliminating the need for lengthy trimming sessions or custom metalwork. By directing heat and vibration away from weld seams, the design helps protect the shell from premature fatigue and stress fractures. Extensive testing of notch depth ensured a careful balance between fuel volume and suspension motion, so builders maintain nearly full capacity while preserving the original ride geometry of 1968 through 1970 GTO and Lemans A body frames.
Internal Pump Module Ensuring Steady Fuel Delivery
Housing the 255 LPH Walbro pump entirely inside the tank guarantees continuous submersion, keeping the unit submerged even during hard launches or aggressive cornering. This placement prevents air ingestion that can cause cavitation and sudden pressure drops, so the system delivers smooth fuel flow at all engine speeds. Combined with a precision sending unit and fitment gaskets, the internal module maintains pressure consistency for performance builds up to 550 horsepower. With stable delivery throughout the rev range, tuners can focus on calibration rather than chasing intermittent fuel starvation issues.
Factory Style Mounting for Direct A Body Fitment
Every hardware component aligns with the original A body mounting points on 1968-1970 GTO and Lemans chassis, allowing installers to drop the unit into place without welding or brackets. The filler neck seats snugly in the stock opening, and the included straps, vent filter, sending unit, gaskets and fasteners all fit without modification. Electrical connections and hose outlets are positioned to match factory layouts, simplifying plumbing and wiring routes. As a result, this assembly streamlines the swap process and keeps projects on schedule by removing guesswork during installation.
Calibrated Flow Rate for LS Engine Performance
The selected 255 LPH output is matched to the fuel demands of modern LS powerplants, supporting boost or naturally aspirated builds up to 550 horsepower with ample margin. By providing a steady high volume of fuel, the pump helps maintain optimal air-fuel ratios under acceleration and at wide-open throttle. This capacity reduces the risk of lean dips and preserves throttle response even during extended track sessions or spirited driving. Fine-tuning becomes more predictable when fuel delivery remains unwavering from idle through peak rpm, giving builders confidence in both performance and reliability.
Trust in this design for consistent fuel delivery. For a Larger capacity fuel pump Kit at 400 LPH see our 1968-1970 GTO 400 LPH pump Tank Kit (notched).