High-Flow EFI Fuel Tank Kit for LS Swaps in 1968-1970 Pontiac GTO and Lemans A-Body
Tackling tight clearance issues in a 1968-1970 Pontiac GTO or Lemans turns on precise modifications around the stock fuel tank, and this EFI kit removes the guesswork with a tailored notched lower shell. Inside the tank a submerged 255 LPH pump safeguards against air pockets during cornering or hard starts, delivering steady supply under load to support up to 550 horsepower LS setups. Mounting points line up with original A Body frame rails so the assembly drops in with stock straps and sending unit, avoiding trimming or adapter kits and letting builders complete their swaps faster. Careful profiling around exhaust tubes and suspension arcs preserves fuel capacity and rear tire travel without rubbing or clearance conflicts in either GTO or Lemans chassis.
Notched Shell Geometry for LS Swap Clearance
Profiled around exhaust tubes and suspension arcs, the lower shell ensures full rear tire travel and zero interference with frame rails. Careful shaping preserves nearly stock fuel capacity while maintaining original ride geometry in 1968 through 1970 Pontiac GTO and Lemans A body applications. By directing heat away from critical welds, the design also reduces stress under prolonged operation. Precision cutting eliminates guesswork, letting builders fit an LS engine without trimming or custom brackets. Testing confirmed that the clearance balance supports spirited driving without fuel slosh or component abrasion.
Submerged Fuel Pump Module Ensuring Stable Flow
The 255 LPH pump module remains fully inside the tank to prevent air pockets that lead to cavitation and pressure loss during hard launches or cornering. Permanent immersion of the pump assembly delivers consistent pressure from idle to peak rpm, supporting a reliable air fuel ratio under load. Builders tuning high output LS engines gain confidence as the module combats fuel starvation at critical moments. Its integration also extends service intervals by keeping the pump cool and protected from external heat sources.
Drop In Installation on 1968 through 1970 GTO and Lemans A Body
All mounting points line up with the original A body frame rails so the assembly drops in using factory straps and stock hardware. The sending unit, filler neck, vent filter and gaskets install without trimming or adaptors, streamlining plumbing and wiring tasks. This straightforward fitment removes hours of trial and error, letting shops and enthusiasts complete LS swaps faster. Including straps and hardware in the kit ensures nothing is left to chance, and the result is a secure, leak free installation every time.
Engineered Capacity for 550 Horsepower Builds
Matched to support up to 550 horsepower LS engines, this tank kit offers extra margin for future performance upgrades. The high capacity pump works in concert with a nearly stock volume tank to maintain steady delivery under boost or naturally aspirated operation. Consistent supply prevents lean conditions at wide open throttle and gives tuners room to explore higher power levels. Whether for road course sessions or spirited street driving, the system ensures uninterrupted power delivery and reliable fuel pressure over time.
For a Larger capacity fuel pump Kit at 400 LPH see our 1968-1970 GTO 400 LPH pump Tank Kit (notched) and count on MuscleRods for a precise fit and steady supply under load.