MuscleRods LS Engine Swap Kit for 1970-1972 Chevy Monte Carlo
If you are fitting an LS engine into a 1970 to 1972 Chevy Monte Carlo A Body chassis, this conversion kit ensures precise motor mount and crossmember alignment for a perfect drivetrain alignment. MuscleRods designed the mount brackets and crossmember to fit 4L60E and 4L80E transmissions without frame trimming. Each steel bracket is TIG welded at key stress points and is made in the US for long term reliability. With generous clearance for deep oil pans and predrilled mounting bosses matching the frame rails, installation becomes a straightforward process free of guesswork.
Precise Mount Positioning for Vibration Reduction
By holding the LS engine and transmission at the exact alignment plane this kit preserves the factory drivetrain angle to cut vibration. Precise mount positions prevent angular deflection at each universal joint and extend the life of prop shaft components. The geometry also clears aftermarket deep oil pans, so no grinding or rail modifications are needed. Drivers benefit from smooth throttle response and a refined ride under varying load conditions.
American Steel Brackets with TIG Welds at Key Stress Points
Each motor mount bracket is cut from heavy gauge American steel and welded using TIG at stress areas to ensure peak resistance to engine torque. TIG welding offers deep fusion with a consistent bead profile for improved fatigue resistance at load bearing junctions. Fabrication in United States plants allows strict control of steel grade and weld integrity. The result is a robust structure that withstands daily driving and track sessions without warping or misalignment.
Integrated Crossmember Accommodating 4L60E and 4L80E Transmissions
The crossmember features predrilled mounting bosses spaced to align seamlessly with Monte Carlo A body frame rails for both 4L60E and 4L80E transmissions. Its design locates the crankshaft and torque converter at the optimum plane to maximize power transfer and protect the transmission input seal. A dedicated polyurethane mount and set of spacers dampen drivetrain noise and reduce harshness for a quieter cabin. Installers gain the flexibility to use common GM automatic units without additional brackets or frame alterations.
CNC Fabrication and Complete Kit for Hassle Free Fit
Every component arrives as a complete kit with motor mounts, frame brackets and the crossmember assembly along with a full pack of hardware and polyurethane mount. CNC laser cutting of each piece yields precise contours that drop directly onto the frame rails for immediate alignment. This unified approach removes guesswork and trims installation time, making it ideal for professional shops and home restorers. With no parts to source separately, builders can focus on fitment and finishing rather than custom fabrication.
Count on MuscleRods for precision alignment and reliable performance. To access a more robust kit where you can build this same kit but this is a customizable kit where the user can select their own parts to better suit their needs, see our Complete LS Swap Kits - LS Kit Builder.