MuscleRods LS Engine Swap Kit for 1963-1972 C-10/C-15 and 1969-72 2WD Blazer/Jimmy
Installing an LS motor into a 1963-1972 GM C-Series truck or 2WD Blazer often leads to tight engine bay clearances and uneven driveline angles that can introduce vibration. The 1963-1972 GM Truck LS Conversion Kit addresses these challenges with precision CNC machined motor mounts and a reinforced crossmember that align the block and output shaft exactly to fit T56, 4L60E, 4L80E and 6L80E transmissions without modifying the tunnel. MuscleRods also engineered a raised sump provision for full clearance of LH8 and high capacity oil pans so that driveline components stay protected even under demanding use.
Precision CNC Motor Mounts for Accurate Drivetrain Alignment
The conversion kit's motor mounts are CNC machined to exact tolerances, ensuring the LS block sits at the ideal angle relative to the frame rails. This precision placement keeps universal joint angles within their design limits, reducing vibration and wear on the transmission input shaft. Grade eight fasteners lock the mounts in place and resist loosening under repeated load cycles, so alignment remains consistent over time. By eliminating the need for shims or guesswork, these mounts simplify installation and deliver a vibration-free driving experience. Every component is inspected to guarantee consistent fitment across multiple GM half ton models.
Direct Fit Crossmember Suited for Multiple GM Transmissions
The custom crossmember is engineered to slip into factory frame openings without any cutting or grinding, preserving stock rails and tunnel integrity. It aligns the bellhousing perfectly for T56, 4L60E, 4L80E and 6L80E boxes using existing bolt patterns, so installers can drop in modern transmissions with confidence. For heavier units like the 6L80E, the crossmember maintains the correct output shaft angle to the carrier bearing, preventing undue stress on driveline components. This bolt-in design reduces installation time and eliminates the need for specialized fabrication tools. A pair of side brackets further reinforce the assembly for dependable support under load.
Raised Sump Design Enabling High Clearance Oil Pan Use
To accommodate aftermarket and truck style oil pans, the crossmember incorporates a raised sump provision that clears deep-reach or LH8 pans when ground space allows. This elevated position prevents interference between the pan and crossmember or terrain, ensuring reliable oil pickup even under hard acceleration or cornering forces. Builders can fit retro style cast pans or high volume configurations without modification, preserving factory fluid capacity and flow dynamics. The design also minimizes the risk of pan damage over uneven surfaces, protecting the bottom of the engine in demanding environments.
Polyurethane Transmission Mount and Frame Bracket Integration
The included polyurethane transmission mount absorbs driveline shocks while resisting transmission movement under torque, preserving precise alignment achieved by the motor mounts. Frame brackets crafted from robust steel slip into existing chassis holes to secure the crossmember and mount assembly, eliminating the need for drilling. Polyurethane's resilience reduces noise without compromising rigidity, providing a quieter cabin and smoother power transfer. Together, these components form a cohesive support system that maintains optimal angles and reduces stress on bushings and joints throughout the drivetrain.
Count on MuscleRods for precise alignment and lasting support; for a more robust kit that lets you select parts to suit your needs see our Complete LS Swap Kits - LS Kit Builder.