MuscleRods LS Engine Swap Kit for 1973-1991 GM C/K-10/C/K-15 and K5 Blazer/Jimmy Trucks
For restorable C/K and Blazer projects, the 1973-1987 2WD GM Truck LS Conversion Kit is engineered to secure accurate LS engine and transmission placement without modifying the floor panel. By integrating robust engine and frame mounts with a dedicated transmission crossmember, this kit supports T56, 4L60E and 4L80E installations while preserving original chassis geometry. MuscleRods designed the mounting brackets to clear deep sump pans and maintain ground clearance on rough roads. Installation follows factory mounting points and eliminates the need for tunnel reshaping, letting builders focus on wiring and final tuning.
Precision Engineered Drivetrain Alignment
The kit's motor and frame brackets are machined to position the crank centerline at the factory angle, preserving the original drivetrain geometry for LS engine swaps into classic C/K and Blazer frames. Even minimal deviation from this angle can introduce vibration and accelerate wear on u-joints and transmission bearings. By maintaining the correct orientation, installers achieve consistent vibration reduction and enjoy a smoother power delivery that extends the life of driveline components. This careful alignment also translates to improved ride comfort on both pavement and rough terrain.
Transmission Crossmember Designed for Direct Fitment
The included crossmember and outer brackets allow bolt-in installation of T56, 4L60E and 4L80E transmissions without altering the floor panel or transmission tunnel. This design leverages factory mounting points on the frame rails, eliminating the need for sheet-metal reshaping or structural modifications. As a result, builders spend less time on metalwork and retain the original chassis rigidity. Integrated mounting provision keeps the transmission aligned under torque, ensuring efficient torque transfer and reducing driveline noise.
Integration of Deep Sump Oil Pans for Enhanced Ground Clearance
Engine mounts are positioned to clear oil pans up to four inches deep, accommodating high-volume designs such as Moroso or retro style cast aluminum pans. By locating the block slightly forward and higher, this configuration preserves critical ground clearance for off-road use and steep inclines. The extra pan depth supports reliable oil pickup under cornering loads and over uneven terrain, safeguarding the lubrication system during spirited driving or trail duty.
American Made Mounts and Hardware Delivering Durable Support
Every motor mount, frame bracket and hardware component in this kit is manufactured in the USA from premium steel and polyurethane, offering superior resistance to heat, oil and mechanical stress. Polyurethane isolators reduce deflection compared to rubber, maintaining precise engine and transmission placement under load. Reinforced gussets on the crossmember brackets ensure long-term durability, while the comprehensive hardware pack provides fasteners for a complete installation. This domestic build quality delivers reliable performance for professional shops and home garages alike.
Count on MuscleRods for a reliable foundation in your LS project; for a more robust kit that lets you select parts to suit your needs, see our Complete LS Swap Kits - LS Kit Builder.