MuscleRods 1964-1967 A-Body LS Engine Swap Kit Chevelle El Camino GTO/Tempest Cutlass/442 Skylark
Swapping a modern LS powerplant into a classic 1964-1967 GM A-Body often runs into frame rail and driveline geometry challenges; the 1964-1967 A-Body LS Conversion Kit solves these issues by matching bracket contours to the original rails and fixing Gen III and IV blocks at the proper angle. This kit also integrates direct transmission support for 4L60E and 4L80E applications without any floor modification, preserving the chassis integrity. With generous oil pan clearance and mount positions optimized for minimal vibration, installers spend less time trial fitting and more time finishing their build on schedule. Bracket components are crafted from cold rolled steel and paired with durable bushings to isolate torque pulses and safeguard the frame under load.
Precision Engine and Chassis Integration for A-Body Platforms
The conversion kit's brackets are CNC formed to match the factory frame rail contours on 1964–1967 GM A-Body models, ensuring the LS block mounts at the exact angle recommended by GM engineers. By preserving correct drivetrain geometry, torque pulses transfer smoothly through the driveshaft and universal joints under hard acceleration, reducing stress on critical components. Installers benefit from minimized trial fitting thanks to the precise bracket fit, which cuts installation time and eliminates guesswork. The result is a seamless blend between a modern LS powerplant and a classic chassis that delivers smooth power delivery and dependable road manners.
Durable Steel Bracket Construction with Polyurethane Bushings
Bracket components are precision laser cut from quarter-inch cold rolled steel, chosen for its consistent thickness and high yield strength compared to conventional alternatives. A protective coating process applied after fabrication fights corrosion from moisture and road debris, extending part life even in harsh environments. Bonded polyurethane bushings isolate engine motion and absorb torque impulses without degrading under heat or oil exposure, keeping vibrations contained. Backed by grade-eight plated hardware, the assembly maintains a tight fit that resists loosening over time, delivering a firm yet comfortable ride quality.
Integrated Crossmember Design for 4L60E and 4L80E Transmissions
This kit includes a one-piece transmission crossmember and outer brackets that bolt directly to factory mount points, requiring no tunnel trimming or floor alteration. Interchangeable spacers enable precise height and angle adjustment, ensuring yoke alignment with the driveshaft to prevent premature universal joint wear. By maintaining the correct transmission angle, vibration and noise are kept to a minimum, and service life of rotating components is extended. Comprehensive hardware location documentation and a concise tool list streamline the installation process for hobbyists and professional shops alike.
Unrestricted Clearance for Oil Pans and Underbody Components
A generous gap between the crossmember and frame rails accommodates deep sump, performance and high-capacity oil pans without interference. Intake runners and in-block oil filter positions remain accessible for routine maintenance or performance upgrades, eliminating the need for custom fabrication. The open design also provides clearance for popular bolt-on exhaust headers and undercarriage shields, preserving ground clearance for lowered or custom suspension setups. This thoughtful engineering saves builders time on mock-up and adjustment, resulting in a clean engine bay that welcomes both dyno sessions and day-to-day driving.
Count on MuscleRods for dependable installation and smooth integration. To explore 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.