1965-1970 B-Body Convertible LS/LT Swap Crossmember
Whether you are completing a restoration or building a performance oriented LS or LT conversion in a 1965 to 1970 Impala or Caprice convertible, this crossmember kit provides the precise support you need for the transmission and mount. Constructed from premium steel, the package includes the transmission crossmember, transmission mount, and all required hardware for a true bolt in installation. Backed by chassis stability improvements, it integrates directly with your unmodified frame and supports LS and LT engine conversions without modification. Designed exclusively for 1965 to 1970 convertible chassis.
Precision Engine Support
The 1965-1970 B-Body convertible crossmember is engineered from high-strength 3/16 inch steel plate to deliver exceptional rigidity under load. Laser cutting ensures consistent part geometry, while robotic welding creates uniform seam quality and minimizes stress concentrations. Reinforced gussets along the center tunnel brace the structure against torsional forces, preserving chassis integrity during hard launches and spirited driving. By reducing flex in the engine bay, vibration transmission is minimized, which helps maintain fastener torque and extends the life of drivetrain components.
MuscleRods Mount Compatibility
This crossmember is designed exclusively to mate with MuscleRods mounting systems, guaranteeing proper engine placement and drivetrain angles. When combined with their engineered mounts, the assembly sets the engine at the precise height needed for correct driveshaft centerline alignment. Fitment is seamless with factory convertible floor plans, so no modifications to transmission tunnels or frame rails are required. The end result is improved torque delivery and optimal pinion angle, which translates to smoother operation and reduced wear on universal joints.
Streamlined Installation Process
Installation is simplified through pre-welded locating tabs and precision-drilled holes that align with OEM mounting points. All Grade eight fasteners are included, and weld nuts installed at the factory allow bolt-in assembly without additional welding on the chassis. Detailed instructions mark out frame rail positions and weld zones, cutting installation time by nearly half compared to custom setups. The installer benefits from a repeatable procedure that ensures square fitment and consistent ground clearance across the rear suspension.
Durable Corrosion-Resistant Finish
To safeguard against environmental exposure, each crossmember is treated with a two-stage coating process. An e-coated primer seals the steel against moisture and road contaminants, followed by a textured powder coat that resists chips and abrasion. A UV-stable clear overcoat preserves the finish over years of use. This robust surface treatment delivers long-term corrosion protection, making it ideal for drivers in wet or cold climates. Visually, the clean black finish enhances underbody aesthetics and complements any restoration project.
Trust MuscleRods for a durable foundation that supports seamless LS or LT conversions and improves chassis stability on 1965 to 1970 B-Body convertibles.