MuscleRods LT Engine Swap Kit for 1973-1977 GM A-Body Platforms
Installing a 6.6 L8T from the LT family into a 1973-1977 GM A-Body chassis demands pinpoint accessory placement and the LT Series AC/Power Steering Bracket 6.6L L8T delivers a direct mounting solution for both the compressor and power steering pump. Matched to original frame rail spacing and engine centerline with precision CNC machining, this bracket preserves front suspension geometry and maintains the correct pinion angle under load. It ships complete with all hardware and spacers so installers avoid extra trips and can focus on fitting the assembly in Chevelle, Monte Carlo, Laguna, El Camino and other A-Body platforms. MuscleRods relies on US fabrication standards to ensure reliable performance on street or track use.
Heavy Gauge Steel Construction Preserving A-Body Chassis Geometry
The LT Series bracket is CNC machined from heavy gauge steel, matching the original frame rail spacing and engine centerline within thousandths of an inch. This exacting production process eliminates the need for mockups or custom shims, allowing installers to position the 6.6 L L8T motor correctly on first pass. By preserving the factory suspension geometry and maintaining the proper pinion angle under load, the bracket safeguards driveline alignment for street and track conditions. Domestic fabrication standards ensure consistent weld quality and dimensional accuracy across every unit. As a result, enthusiasts receive a structural foundation that stands up to the increased forces generated by modern LT powerplants without compromising the classic A-Body architecture.
Direct Mounting Solution for Compressor and Power Steering Pump
This bracket provides a tailored interface for both the AC compressor and power steering pump, aligning accessory bores with precision to the LT engine block. Integrating the compressor and pump mounts into a single assembly reduces installation steps and minimizes potential alignment errors. All necessary spacers and hardware arrive in one package, so installers avoid multiple trips to the parts store during fitment. The direct mounting approach preserves engine bay clearance while retaining the vintage A-Body appearance. By streamlining accessory placement, builders can focus on final system integration rather than fabrication adjustments.
Integrated Transmission Crossmember Design for Drivetrain Support
Included with the bracket is a reinforced transmission crossmember formed from the same heavy gauge steel, designed to distribute torque loads evenly across both chassis rails. The built in mount accepts popular automatic options such as the 4L60E and 4L80E without major underbody modifications, maintaining original bumper mount locations and rail spacing. This approach preserves the factory undercarriage layout while adding strength where Gen V LT output can stress a vintage frame. Each frame bracket and crossmember component undergoes rigorous quality control to ensure consistent alignment and weld integrity. The result is a rock solid splice between engine and transmission that withstands spirited driving and demanding road conditions.
Polyurethane Transmission Mount System for Vibration Isolation
The included polyurethane transmission mount and spacer kit isolates drivetrain vibration far more effectively than standard rubber isolators, reducing noise transfer into the cabin for a quieter driving experience. Polyurethane's resistance to oil and heat ensures that the mount retains its shape and support even during extended track runs or highway cruising. Precisely machined spacers align with the hardware pack to simplify installation and eliminate installation guesswork. This mounting solution also accommodates a variety of Gen V LT variants-including LT1, LT4, L83 and L86-when paired with the recommended cast aluminum oil pan kit for proper hood clearance. Designed to resist compression set under high torque loads, the system delivers consistent drivetrain positioning for both comfort and performance longevity.
Count on MuscleRods for a well-engineered foundation for your swap and, 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 LT Swap Kits - LT Kit Builder.