Complete MuscleRods LS Engine Swap Kit for Tri-Five Chevy
If you are restoring a 1955 to 1957 Chevy Tri Five and planning to fit a modern LS V8 the 1955 to 1957 Chevy LS Conversion Kit resolves the most common fitment conflicts while preserving the frame's original contours. By using stamped steel crossmember and engine mounts that bolt to factory rails the kit positions the LS and your chosen transmission at the correct angle without any tunnel cuts or rail modifications. Comprehensive clearance for LH8 and other deep sump oil pans ensures designs fit neatly under the hood without altering the tunnel. MuscleRods supplies grade eight hardware and polyurethane inserts to absorb vibration and maintain drivetrain alignment for T56 4L60E and 4L80E gearboxes.
Precision Frame Brackets Ensuring Drivetrain Alignment
The conversion kit includes frame brackets custom cut to match the original frame rails of 1955 to 1957 Chevrolet non-convertible models. These brackets guide the LS engine and transmission to align precisely with the rear driveline, reducing angular stress on universal joints. By preserving the factory rail geometry the design prevents torque induced vibration and improves power delivery. The consistent orientation also helps maintain service life of couplings and seals by eliminating misalignment in hard acceleration or deceleration. Builders can trust that once mounted the engine will hold its position under load without requiring adjustment.
Seamless Transmission Fit for T56 4L60E and 4L80E Gearboxes
Dedicated crossmember plates and transmission mount assemblies provide bolt in support for T56 manual or 4L60E and 4L80E automatic gearboxes. Each bracket lines up with factory holes so no tunnel trimming or rail modifications are needed. The included spacers and grade eight hardware set the transmission at the correct height and angle to match the engine output shaft. This ready to install arrangement eliminates adapter shims and reduces the risk of leaks or case wear caused by poor support. Technicians find the process speeds up the build and delivers a precise fit every time.
Optimized Oil Pan Clearance Under Classic Hood Lines
The stamped steel crossmember and brackets are designed around GM high clearance and LH8 style oil pans to allow the use of deep sump designs without altering the tunnel. This maintains the original hood contours while enabling increased fluid capacity for sustained performance driving. Extra oil volume enhances cooling and prevents starvation when cornering or towing heavy loads. Builders retain the iconic Tri Five profile and gain modern reliability benefits without resorting to custom chassis alterations. The solution works seamlessly with low profile intakes to ensure full hood clearance.
Robust Construction with Vibration Isolating Polyurethane Mounts
All brackets and the crossmember are laser cut from heavy gauge steel and heat treated for strength to withstand LS torque output and road vibrations. Polyurethane mounting inserts absorb engine movement and isolate noise from the chassis, extending the life of driveline components. Grade eight bolts and washers secure each connection point and resist common fatigue failures seen in lesser kits. As a result builders experience a quieter ride, fewer maintenance events, and reliable performance under load. These durable parts are made in the USA and deliver consistent quality on every build.
Trust MuscleRods for precise fit and reliable performance. For a more robust kit where you can build this same kit and select your own parts to better suit your needs see our Complete LS Swap Kits - LS Kit Builder.