MuscleRods LS Engine Swap Kit for 1963-1972 C/K-10 & C/K-15 Trucks and K5 Blazer/Jimmy
Installing an LS powerplant under the stock tunnel of a 1963-1972 GM C/K or K5 frame poses precise alignment and clearance challenges that can compromise a vibration-free ride. This 1963-1972 GM Truck LS Conversion Kit solves those challenges with CNC machined motor mounts that lock the block at the ideal angle, plus a tailored crossmember and side brackets that locate in factory rail holes without cutting or grinding. Fitment spans popular gearboxes such as T56, 4L60E and 6L80E while supporting both raised sump and LH8 oil pans to suit varying ground clearance needs. Constructed from American steel, the assembly preserves frame integrity under towing or spirited driving by delivering a drivetrain alignment solution you can trust.
CNC Machined Motor Mounts for Precision Drivetrain Alignment
The kit's motor mounts are crafted using computer controlled machining to lock the LS engine at the exact angle needed under the stock tunnel. This level of precision ensures that driveline angles remain optimal, minimizing stress on universal joints and drivetrain components. By eliminating installer guesswork, these mounts help bearings and couplings endure greater loads with less risk of premature wear. Users will notice a marked reduction in vibration and noise as power flows smoothly from the crank to the rear axle. The repeatable tolerances of CNC machining translate directly into consistent performance across every installation.
Frame Rail Integration with Tailored Crossmember Design
The custom crossmember and side brackets fit directly into the factory rail holes on 1963-1972 GM half ton frames, requiring no cutting or grinding. This approach preserves the original frame strength and maintains factory geometry, so towing capacity and chassis rigidity remain uncompromised. Installers benefit from a straightforward bolt in procedure that aligns the transmission exactly where it belongs under the tunnel. By using existing locating points, the assembly supports popular gearboxes like the T56, 4L60E and 6L80E without additional modifications. The result is a robust mounting platform that blends seamlessly with the truck's structural design.
Oil Pan Versatility for Street and Off Road Conditions
This conversion kit accepts both raised sump oil pans and LH8 low profile pans, giving builders flexibility to match driving style and ground clearance needs. The raised sump option lifts the reservoir to clear uneven terrain and trail obstacles, while the LH8 pan keeps the underbody profile slim for street use or tight garage parking. Both designs share factory bolt patterns, so there is no need for welding, slotting or custom adapters during installation. Owners can switch between pans quickly to suit seasonal changes or mission profiles. This adaptability means oil control and engine protection remain reliable, no matter the route.
American Steel Brackets and Polyurethane Mount for Vibration Control
The frame brackets and crossmember are formed from heavy gauge American steel, providing the strength required for spirited driving or heavy towing. A dedicated polyurethane transmission mount cushions shift shock and isolates drivetrain vibration before it reaches the driveshaft or cabin, enhancing comfort on extended trips. Grade specific hardware in the bolt kit maintains proper clamp force under load and resists loosening over time. Together, these elements protect universal joints and gearbox seals, extending service intervals and reducing maintenance costs. The choice of materials and design focus on durability ensures many seasons of dependable operation.
Count on MuscleRods for a precise foundation for your LS swap. 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.