Mopar A-Body B/RB To Slant 6 Motor Mounts

The Mopar A-Body B/RB To Slant 6 Motor Mounts by Trans-Dapt solve a common engine swap challenge faced by classic Mopar enthusiasts and restoration shops. When converting an A-Body vehicle—such as a Dodge Dart, Plymouth Duster, or Valiant—from a larger B or RB displacement engine down to a more economical Slant 6 powerplant, factory mounting points no longer align. These purpose-built brackets bridge that compatibility gap, allowing bolt-in installation without extensive chassis modification or custom fabrication work.

These motor mounts are engineered to precisely locate the Slant 6 engine in the A-Body engine bay while maintaining proper driveline geometry and clearance for accessories. Trans-Dapt's design accounts for differences in engine block mounting surface heights and lateral positioning between the larger B/RB engines and the compact Slant 6, ensuring the powerplant sits at factory-correct angles relative to transmission and frame rails. The mounts utilize proven elastomer isolation compounds to dampen vibration transmission to the chassis, preserving ride quality and reducing noise. Weighing 5.85 pounds with compact overall dimensions, this kit integrates seamlessly without adding unnecessary bulk or weight to your swap project.

Mechanics and builders downsizing classic A-Body Mopars for improved fuel economy, reliability, or parts availability benefit most from this direct-fit solution. Whether you're restoring a numbers-matching Slant 6 original or converting a tired big-block to the legendary 225-cubic-inch inline six, proper motor mounts are non-negotiable for safe, durable operation. Installation requires basic hand tools and typically takes an experienced technician two to three hours. These mounts are sold as a matched set and are compatible with all Mopar A-Body variants equipped with Slant 6 engines, making them an essential component for any serious engine swap or restoration project.