Complete MuscleRods LS Engine Swap Kit for 1978-1988 G-Body (Monte Carlo/Regal/Cutlass)
Installing an LS powerplant into a 1978-1988 G-Body like a Monte Carlo, Regal or Cutlass can present fitment challenges with mounts and tunnel clearance, and the 1978-1988 G-Body LS Conversion Kit solves these issues with a full set of precision formed brackets and crossmembers. This kit maintains the correct drivetrain angle to eliminate vibration and supports T56, 4L60E, 4L80E and 6L80E transmissions without modifying the tunnel. Owners also benefit from options for a high clearance or LH8 oil pan setup, preserving undercarriage space for road obstacles. Every component is made in the USA and arrives with detailed instructions to guide a clean, efficient installation.
Precision Drivetrain Angle Maintenance
The kit's precision formed engine and transmission brackets hold the LS engine at the exact angle needed to align with the transmission output. By maintaining this alignment, the system virtually eliminates vibration under load and reduces stress on universal joints and transmission input shafts. This careful geometry translates into smoother power delivery and less wear on drivetrain components over time. Installers benefit from a setup that delivers refined highway cruising and consistent performance without custom modifications to the factory chassis.
Flexible Transmission and Oil Pan Support
This conversion framework adapts seamlessly to T56, 4L60E, 4L80E and 6L80E transmissions, thanks to precision-drilled bolt patterns and purpose-built crossmember brackets. It also accommodates both high clearance and LH8 oil pans, preserving the factory tunnel shape and undercarriage space. By eliminating the need to cut or reshape the transmission tunnel, the design streamlines installation and protects ground clearance on uneven roads. Whether you choose a deep sump to guard against rocks or the shallow LH8 for garage clearance, the kit provides the mounting geometry to fit without alteration.
American Made Construction for Lasting Reliability
Every bracket, mount and hardware component is proudly formed and welded in the USA to precise tolerances. The pair of motor mounts and the integrated crossmember use robust steel construction for maximum rigidity, while the included polyurethane transmission mount and spacers isolate vibration without sacrificing support. A driver-side Z support bracket adds lateral stability, distributing torque loads efficiently into the chassis. With a complete hardware pack and clear instructions, installers achieve a rock solid foundation that holds up under repeated hard launches and daily driving alike.
Count on MuscleRods for precise fit and lasting reliability. For a more robust kit where you can build this same kit but this is a customizable kit where you can select your own parts to better suit your needs, see our Complete LS Swap Kits - LS Kit Builder.