Complete MuscleRods LS Engine Swap Kit for 1991-1996 Chevy Caprice and 1994-1996 Impala
MuscleRods 1991 to 1996 B Body LS Conversion Kit directly addresses the clearance conflicts and driveline angle misalignment that stall most LS engine installations in a Chevy Caprice or Impala. Featuring CNC machined steel mounts and a bolt on crossmember, this kit preserves drivetrain alignment and underbody clearance for both standard and LH8 oil pans on Gen III and Gen IV LS motors paired with T56, 4L60E or 4L80E transmissions. It uses existing frame rail holes to secure the assembly so no tunnel widening or floor cutting is necessary. By matching centerlines precisely between engine and transmission, the design prevents stress on universal joints and bearing surfaces for a stable, vibration free response.
Precision CNC Machined Engine Mounts
The steel engine mounts are CNC machined to exact dimensions, aligning the LS engine and chosen transmission with factory centerlines. This precise fit reduces stress on universal joints and bearing surfaces by maintaining correct drivetrain angle under all driving conditions. By matching mount bores to block mounting pads without secondary adjustments, these brackets lock the powertrain in position and prevent shift under load. The rigid construction accommodates both Gen III and Gen IV platforms without adapter trimming, which extends component life and delivers consistent engine response.
Bolt On Crossmember Preserving Frame Geometry
The crossmember and frame brackets attach to existing holes in the side rails, eliminating the need for transmission tunnel modifications or floor cutting. This design secures the powertrain at the correct ride height, preserving hood clearance and exhaust routing under the chassis. Installers can complete the assembly using common hand tools and the supplied hardware pack, which reduces fitment time and limits chassis alteration. By retaining original frame rail geometry, fuel and brake lines remain in their factory positions, preventing damage during installation.
High Clearance Oil Pan Compatibility
Support for both standard and LH8 oil pan profiles ensures the sump clears the crossmember footprint, offering ample ground clearance for rough road surfaces and spirited cornering. Whether using a cast aluminum retro style pan or a high clearance pump pan, no modification is required to the pan or crossmember. This adaptability allows builders to select their preferred oiling solution while maintaining underbody geometry. The result is a setup that delivers reliable oil control without compromising chassis clearance or requiring custom braces.
Polyurethane Transmission Support for Vibration Control
The included polyurethane mount absorbs driveline shock pulses more effectively than a factory isolator, reducing gear rattle and harsh loading on the output shaft. Its firm material resists deformation under heavy torque, keeping the driveline aligned during rapid throttle changes and shift events. This targeted vibration control enhances cabin comfort and reduces fatigue on long runs or spirited drives. By isolating NVH sources, the mount delivers a smoother response under load and improves overall driving refinement.
Count on MuscleRods for precision and reliability in every swap. 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.