Complete MuscleRods LT Engine Swap Kit for Impala 1958-1964 B-Body
Whether you're restoring a classic Impala or building a weekend cruiser, the Complete MuscleRods LT Engine Swap Kit brings precise bracketry and mounts to install a Gen V LT powerplant into the 1958 through 1964 B-Body frame with no chassis modifications. Custom machined supports dictate exact engine placement to preserve driveline angles, reduce vibration and protect transmission seals under load. A reinforced crossmember ties the original rails together to maintain frame rigidity and handle increased torque, while the bolt-in transmission mount fits both 4L60E and 4L80E units without cutting the floorpan. This complete solution from MuscleRods ensures that every component arrives ready to install with American made quality you can count on.
Precision Engine Bracketry for Optimal LT Placement
Custom machined supports locate the Gen V LT unit within the Impala B-Body frame with exact tolerances that eliminate guesswork during installation. Each bracket is CNC cut and finished to maintain consistent thickness and flatness, ensuring the crank centerline aligns perfectly with the transmission input. This accuracy preserves driveline angles, reduces vibration transfer into the chassis, and protects seals and bearings from premature wear. Installers report that maintaining proper engine orientation also speeds up tuning of the engine management system and throttle response calibration. The engineered bracketry delivers a smooth power curve and minimizes noise, vibration and harshness for a refined driving experience in a classic package.
Reinforced Crossmember Built from Heavy Gauge Steel
The crossmember is fabricated from domestic heavy gauge steel plate and spans both factory rails to form a rigid support backbone for increased torque loads. Engineered through finite element analysis to withstand cornering forces and rapid torque spikes, it resists bending and maintains original rail spacing under hard acceleration. By tying the rails together without altering stock frame geometry, it prevents fatigue points and distortion commonly seen with oversized powerplants. The bolt in design requires no cutting or welding, preserving the Impala's original architecture while adding the strength needed for spirited driving. A corrosion resistant finish completes the assembly, protecting the steel from road exposure and extending service life.
Integrated Transmission Mount for 4L60E and 4L80E Fitment
This transmission mount arrives pre assembled to accept both 4L60E and 4L80E units, simplifying one of the most challenging aspects of a swap. Pre positioned inserts and ready to use hardware match stock frame holes exactly, removing guesswork about anchor point alignment or custom fabrication. Installers simply set the mount in place, secure it with factory style bolts and proceed to tie in yoke and driveline components. Because the mount does not require floorpan trimming, interior clearance remains factory correct and the transmission tunnel is left intact. The secure fit reduces stress on seals and improves leak resistance under high load conditions, contributing to reliable performance.
American Steel Construction Offering Durability
All brackets, mounts and the crossmember are manufactured in the United States from high grade steel and treated with a corrosion resistant coating to stand up to road salt and moisture. Domestic fabrication ensures tight quality control from material sourcing through final inspection, delivering consistent fitment from chassis to chassis. Rigorous testing under repeated heat cycles and dynamic stress confirms that each component maintains structural integrity over time. For restorers and weekend builders alike, this swap kit provides confidence that modern LT power can be integrated without sacrificing long term durability or the clean lines of a classic Impala.
Count on MuscleRods for precision and durability in every swap. For a more robust kit that you can customize to your requirements see our Complete LT Swap Kits - LT Kit Builder.