* Engine Size and Weight: The Cummins is a much larger and heavier engine. This requires modifications to the engine bay, possibly including firewall modifications, to accommodate its size. The increased weight will also impact the vehicle's handling and suspension.
* Mounting: The Cummins will require a custom engine mount system. The existing V8 mounts won't work.
* Transmission: The Cummins typically uses a different transmission (usually a manual or automatic designed for its high torque output) than a Dodge V8. This means you'll need a new transmission, associated components (driveshaft, transfer case, etc.), and potentially a custom adapter to mate the engine and transmission.
* Wiring Harness: The electrical systems are completely different. You'll need a new wiring harness or significant rewiring to integrate the Cummins into the vehicle's electrical system.
* Fuel System: The Cummins uses a completely different fuel system than a gasoline V8. This will require new fuel lines, tank, pump, and injectors.
* Exhaust System: The Cummins exhaust system will need to be custom-fabricated.
* Cooling System: The Cummins may require a larger radiator and cooling system to handle its heat output.
* Computer Control: The Cummins engine management system is entirely different. You'll likely need a custom tuning solution or adaptation to make it work with the vehicle's existing systems.
In short: This isn't a weekend project. It's a substantial undertaking that requires significant mechanical knowledge, welding skills, fabrication abilities, and access to specialized tools and parts. It's often a project for experienced mechanics or dedicated enthusiasts with a lot of time and resources.
If you're considering this swap, be prepared for a challenging and potentially expensive project. Thorough research and planning are absolutely essential. Consider consulting with experienced mechanics familiar with Cummins engine swaps before you begin.
