MuscleRods LS Engine Swap Kit for 1964-1967 A-Body Chevelle El Camino GTO Cutlass Skylark
For diehard enthusiasts fitting an LS engine into a classic mid sixties A Body chassis the 1964-1967 A-Body LS Conversion Kit solves alignment headaches and clearance conflicts without guesswork. Laser cut steel brackets maintain precise driveshaft angle control while preserving room for deep sump oil pans. Installers will find the welded crossmember drops into original frame holes for plug in 4L60E and 4L80E fitment with simple spacer adjustments. Durable polyurethane bushings damp vibration and lock the block to factory tolerances for a quiet cabin and consistent assembly.
Accurate Steel Bracket Fabrication for A Body LS Alignment
Each engine mount bracket is produced from heavy gauge steel plate using laser cutting to achieve exact frame rail contours of the 1964 through 1967 A Body chassis. This process delivers exceptionally tight dimensional control so the LS block seats at the GM recommended crank to driveshaft angle without the need for trimming or shims. By locking that angle in place, torque pulses transit smoothly into the driveline and chassis rails see less stress under acceleration and braking. Builders save time by placing the bracket assembly directly into original frame holes, ensuring a repeatable block position for every installation. The bracket geometry also maintains sufficient clearance for deep sump oil pans, eliminating contact issues early in the build.
Resilient Bushings to Isolate Engine Vibrations
Durable polyurethane bushings sit between the steel brackets and the block to absorb engine movement while resisting heat and chemical exposure. In contrast to standard rubber mounts that can harden or tear, these bushings maintain their shape under sustained loads, preserving critical alignment of universal joints. The controlled compliance they offer keeps driveline vibration levels low, translating to a quiet passenger compartment and reduced component wear. Grade eight fasteners secure the bushing assemblies with consistent clamp force, preventing loosening over time. The result is a stable powertrain foundation that endures spirited driving without chatter or noise.
One Piece Crossmember Optimized for GM Automatic Units
The integrated transmission crossmember installs directly into the stock A Body frame openings, requiring no underbody modifications or tunnel clearance work. Included height spacers enable installers to dial in the crossmember elevation and angle for perfect yoke alignment with common GM automatics such as the 4L60E and 4L80E. Accurate alignment prevents vibration at the driveshaft connection and protects universal joints from accelerated wear. The single piece design also preserves generous undercarriage space for deep sump pan applications. Both professional shops and home enthusiasts benefit from a straightforward fit that foregoes lengthy test mocks and custom welding.
Wide Compatibility with Gen Three and Gen Four LS Engines
This conversion kit accommodates most Gen Three and Gen Four LS powerplants, including LS1, LS2, LS3, 5.3L and 6.0L variants when paired with a suitably tall oil pan and intake manifold for hood clearance. Transmissions mount directly without adapters or case modifications for the 4L60E and 4L80E applications. All components are manufactured in the USA with laser cut and CNC milling techniques to ensure precise repeatability across every kit. By meeting GM recommended tolerances out of the box, the system eliminates the need for custom fabrication and reduces overall build time. Owners gain confidence in a seamless swap backed by proven engineering.
Count on MuscleRods for a precise foundation for your LS 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.