MuscleRods LT Engine Swap Kit for 1973-1977 GM A-Body Cars
If you are fitting a 6.6L L8T motor from the LT engine family into a 1973 through 1977 A Body chassis, the LT Series AC/Power Steering Bracket provides a direct mounting solution for both the compressor and the power steering pump. Machined from heavy gauge steel to match original frame rail spacing and engine centerline, it eliminates the need for mockups or custom shims. The precise fit preserves front suspension geometry and pinion angle so driveline alignment stays true under street or track conditions. MuscleRods supplies the bracket with all required hardware and spacers for a complete installation that moves your swap project forward without hunting down extra parts.
Precision CNC Machining for Accurate LT to A Body Alignment
The bracket is CNC machined from heavy gauge steel to match original frame rail spacing and engine centerline within thousandths of an inch. This method eliminates the need for trial fit mockups or custom shims, allowing installers to set the 6.6 L L8T motor into a 1973-1977 A Body chassis on first pass. By holding exact tolerances, it preserves front suspension geometry and maintains proper pinion angle under load. Installers benefit from drastically reduced setup time, avoiding repeated measurement and adjustment cycles. The precise fit secures consistent driveline alignment that performs reliably on street and track applications. Overall, this precision approach underpins seamless integration of modern LT engine technology into classic GM frames.
Integrated Transmission Crossmember and Frame Brackets for Structural Rigidity
This kit includes a reinforced transmission crossmember and matching frame brackets formed from the same heavy gauge steel as the motor mount plate. The crossmember positions the transmission mount directly beneath the powerplant, distributing torque loads evenly across both chassis rails. A built-in mount supports popular transmissions such as the 4L60E and 4L80E without requiring major underbody modifications. By retaining original bumper mount locations and rail spacing, it preserves the factory undercarriage layout while adding strength where Gen V LT output can stress an A Body frame. Each component undergoes domestic fabrication and quality control checks to ensure consistent welds and fit. The result is a rock solid splice between engine and drivetrain that stands up to spirited driving and demanding conditions.
Polyurethane Transmission Mounting System for Vibration Control and Durability
The included polyurethane transmission mount and spacer kit isolates drivetrain vibration more effectively than conventional rubber isolators, reducing noise transfer into the cabin for a quieter driving experience. Polyurethane's resistance to oil and heat guarantees steady performance even during extended track sessions or highway runs. Each spacer aligns precisely with the hardware pack, simplifying installation and eliminating guesswork. This mounting solution also accommodates a range 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. Durable by design, the polyurethane elements resist compression set and maintain support under high torque loads. As a result, drivers enjoy both comfort and consistent drivetrain positioning throughout the life of the swap.
Count on MuscleRods for a well-engineered foundation for your LT swap; for a more robust kit that lets you customize parts to suit your needs see our Complete LT Swap Kits - LT Kit Builder.