Complete MuscleRods LS Engine Swap Kit for 1973-1977 A-Body (Chevelle/Monte Carlo/El Camino)
Starting an LS swap into a 1973 through 1977 A Body like Chevelle, Monte Carlo or El Camino often stalls when oil pan clearance or driveline geometry issues surface yet the 1973 through 1977 A Body LS Conversion Kit addresses those obstacles without cutting into the floor tunnel. Precision machined motor mounts bolt directly to the original frame rails and a custom crossmember formed from thick American steel sets the engine and 4L60E or 4L80E transmission at the correct tilt to clear taller oil pans under typical road conditions. Serving as a drivetrain alignment solution the assembly reduces vibration at the universal joint and extends service life by locking in the factory specified driveline angle.
Engineered Motor Mounts Ensure Accurate Driveline Angle
The motor mounts in this kit are machined to very tight tolerances to position an LS engine and 4L60E or 4L80E transmission exactly as intended. By seating each bracket fully on the frame rail original mounting points, the system eliminates flex that can lead to vibration and premature universal joint wear. Accurate alignment locks in the factory specified driveline angle, resulting in smoother power delivery under acceleration and reduced noise during everyday driving. The robust bracket design also preserves chassis rigidity by distributing torque loads evenly and removing the need for later angle adjustments. This approach helps builders move from engine installation to test drives with confidence.
Custom Crossmember Profile Clears Deep Oil Pans
The crossmember and outer supports follow the contour of the A-Body frame rails to make room for taller oil pans without altering the floor tunnel. Fabricated from thick domestic steel plate, each piece is formed and CNC trimmed for an exact fit on 1973 through 1977 GM chassis. This tailored profile makes it possible to install a large capacity pan for improved engine cooling without sacrificing ground clearance or risking damage on uneven surfaces. There is no need for tack welds or time consuming modifications, so builders save effort and avoid cutting into the tunnel. The result is a clean installation that accommodates a variety of oil pan designs while preserving structural strength.
Organized Component Kit Simplifies Swap Assembly
Every piece required for a complete engine swap is included and organized in a clearly labeled hardware pack to guide installers through each step. Along with the motor mounts and crossmember brackets, the kit contains frame brackets, a polyurethane transmission mount bushing, spacers, and grade eight fasteners matched to each bracket. Color coded labels correspond with the instruction sequence, reducing the chance of misplaced parts and cutting assembly time significantly. This full service approach ensures builders have all necessary parts for 1973 to 1977 A-Body installations without sourcing extras. As a result, projects stay on schedule and maintain consistent quality from one build to the next.
Count on MuscleRods for a swap solution you can rely on. For 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.