LS EFI Notched Fuel Tank Kit for 1970 Chevy Monte Carlo
When installing an LS engine in a 1970 Chevy Monte Carlo, underbody packaging challenges and consistent fuel delivery become critical factors, and the 1970 Monte Carlo EFI Fuel Tank Kit addresses both needs. Designed around a heavy steel shell notched to follow the A Body frame rails, this assembly clears modern exhaust routing and wider wheels without modifying the floorpan. A submerged Walbro 255 LPH pump supports engines up to 550 hp, while the calibrated sending unit and inline vent filter ensure accurate level feedback and stable pressure under hard acceleration. Installation uses factory mount points and included hardware for a direct fit that preserves the Monte Carlo's underbody integrity.
Precision Notched Shell for Seamless Underbody Integration
The notched tank shell is fabricated from heavy gauge steel that precisely follows the contours of the 1970 Monte Carlo A Body frame rails. By mimicking the original rail profile, it maintains full exhaust and tire clearance without any floorpan cutting or alteration. This exact fit preserves the car's classic underbody lines and uses factory mounting points for a true bolt in installation that keeps the chassis strength intact. The rigid steel construction resists deformation under load, safeguarding the fuel reservoir and adjacent metalwork during spirited acceleration or highway cruising.
In Tank Pump Assembly Ensuring Steady Fuel Flow
At the core of the kit resides a 255 LPH Walbro pump fully submerged in fuel to eliminate foaming and cavitation under hard acceleration. An integrated check valve holds residual pressure in the feed lines at shutdown, delivering near instant flow on startup while reducing cranking cycles. Placing the pump inside the tank also shortens the fuel line run and centralizes wiring, which minimizes potential leak points and expedites routine servicing. With a flow capacity that supports up to 550 horsepower, this assembly consistently supplies enough fuel whether you are cruising or pushing wide open throttle.
Calibrated Sending Unit for Reliable Fuel Level Feedback
The included sending unit features a low friction float arm and a precisely mapped resistance curve to provide dependable signals to both the factory gauges and modern engine management systems. Its compact design minimizes fuel slosh and float hang up during cornering or heavy braking, preventing false low readings and helping to avoid lean run conditions. Robust electrical connectors and corrosion resistant internals extend service life in demanding environments, ensuring accurate level data for your control unit over many seasons of driving.
Inline Vent Filter Promoting Stable Tank Pressure
The inline vent filter captures moisture and debris before they enter the tank, helping to maintain balanced internal pressure as temperatures and fuel volume change. By preventing vapor lock and reducing seal stress, it protects hoses and fittings from premature wear. The complete kit also includes tank straps, a filler neck shaped to match the original mounting angle, gaskets and all necessary hardware sized for the Monte Carlo frame rails. This ensures a straightforward installation and a finished result that looks and functions like original equipment.
To upgrade to a Larger capacity fuel pump Kit at 400 LPH see our 1970 Monte Carlo 400 LPH pump Tank Kit (notched) and trust MuscleRods engineering for reliable operation.