Complete MuscleRods LS Engine Swap Kit for 1973-1977 A-Body
Tackling an LS swap in a 1973 to 1977 A Body just got more straightforward with the 1973 to 1977 A Body LS Conversion Kit, which delivers engine mounts and transmission supports tailored for 4L60E or 4L80E applications without any floor pan modifications. Installation places motor and frame brackets to maintain correct drivetrain angle and reduce vibration that can stress universal joints during road use. Developed by MuscleRods in the USA, each machined component fits Chevelle, Monte Carlo, El Camino and other classic GM models while clearing a tall oil pan for reliable ground clearance.
Precision Alignment of LS Drivetrain Components
The 1973-1977 A-Body LS Conversion Kit positions motor and frame mounts with exacting geometry to preserve the correct drivetrain angle. This careful alignment reduces vibration and lessens stress on universal joints and mount points, helping to extend the life of both engine and transmission. By holding the LS powerplant and 4L60E or 4L80E transmission in ideal relation, the system delivers a noticeably smoother feel behind the wheel. Whether accelerating from a stop or cruising at highway speed, the precision-engineered alignment translates into confident, vibration-free operation.
Effortless Integration with 4L60E and 4L80E Transmissions
This swap kit is designed to accept both 4L60E and 4L80E units without any floor pan modifications, dramatically reducing install time and complexity. All mounting brackets and crossmember components arrive ready to bolt into place, allowing builders to bypass fabrication and focus on final assembly. The universal hardware pack streamlines torque sequences and ensures a secure connection between transmission and frame. For enthusiasts seeking a straightforward route to modern automatic performance, this package delivers a true plug and play solution.
Accommodating Tall Oil Pans for Ground Clearance
Many modern LS oil pans extend deeper than their vintage counterparts, risking interference with the A-Body subframe. This conversion kit's crossmember and bracket layout clear tall pans by several inches, preserving vital ground clearance for daily driving and spirited back-road runs. By eliminating the need for pan trimming or custom crossmember fabrication, the design safeguards your investment and maintains a factory-style ride height. The result is reliable under-carriage protection and consistent performance on uneven surfaces.
USA Machining and Structural Integrity
Every mount, bracket and crossmember is precision machined in the USA from high-quality billet and plate stock to strict tolerances. This manufacturing approach yields consistent hole alignment, flat mating surfaces and repeatable fitment across multiple builds. The structural design also incorporates reinforcement points to handle the torque and weight of a modern LS engine without deformation. Backed by rigorous quality control, these components provide a rock-solid foundation that stands up to daily driving and spirited outings alike.
Count on MuscleRods for precise fit and straightforward installation. See our Complete LS Swap Kits - LS Kit Builder to access a more robust and customizable kit where you can build this same setup and select your own parts to better suit your needs.