Complete MuscleRods LS Engine Swap Kit for 1978-1988 G-Body Cars
The 1978 through 1988 G Body LS Conversion Kit supplies a full complement of engine mounts, crossmembers and hardware to simplify LS swaps in GM G Body models built between those years. Each mount and bracket is precision formed in the USA to maintain correct drivetrain angle and support T56, 4L60E, 4L80E and 6L80E transmissions. Design choices such as optional high clearance and LH8 oil pan configurations eliminate tunnel modifications and preserve undercarriage space for a straightforward installation process.
Precision LS Engine and Transmission Alignment
At the core of this conversion kit is the precision forming of engine and transmission mounts to maintain exact drivetrain angles. By aligning the axis of the LS engine with the output of your chosen transmission, the kit virtually eliminates drivetrain vibration under load. This precise geometry reduces stress on universal joints and transmission input shafts, extending the service life of critical components. The result is a smoother power delivery and more refined highway cruising comfort.
Broad Transmission Compatibility
This kit's mounting geometry adapts seamlessly to T56, 4L60E, 4L80E and 6L80E transmissions, allowing you to select the unit best suited to your driving style. No cutting or welding is required when installing these popular GM gearboxes, thanks to precision-drilled bolt patterns and purpose-built crossmember brackets. Whether you prioritize shifting speed, towing capacity or rugged dependability, the conversion framework accommodates your choice without the need for custom fabrications. That versatility keeps your project moving forward with minimal surprises.
Straightforward Installation and Tunnel Preservation
The kit bundles every mounting bracket, hardware pack and crossmember bracket needed for a complete installation, letting you skip trips to the parts store. By offering support for a high clearance oil pan or the LH8 pan style, it preserves the original transmission tunnel geometry and eliminates the need for cutting or reshaping. Comprehensive instructions walk you through bolt patterns and torque specs for each component, resulting in a clean, precise setup. This level of preparation cuts project time and keeps your undercarriage looking factory fresh.
Integrated Mount System for Optimal Rigidity
The synergy of the two motor mounts, frame brackets and crossmember components creates a foundation that resists engine movement under hard acceleration. Each steel bracket is formed and welded in the USA to exact tolerances, while the included polyurethane transmission mount and spacers isolate vibration without sacrificing support. The side Z support bracket adds lateral stability, distributing torque loads into the chassis structure in a controlled manner. This integrated design preserves structural integrity and contributes to consistent handling characteristics over repeated use.
Count on MuscleRods for a precise foundation for your LS swap. To explore a more robust customizable solution see our Complete LS Swap Kits - LS Kit Builder.