* Different Engine Mounts: The engine blocks themselves are completely different shapes and sizes, meaning the engine mounts wouldn't align. You'd need completely custom engine mounts fabricated.
* Transmission Compatibility: The transmission used in a Ford with a 7.3L Power Stroke is likely not compatible with an International engine. You would need to find a compatible transmission and likely adapt the bellhousing or use a custom adapter.
* Wiring Harness: The wiring harnesses are entirely different. You'd need to completely rewire the vehicle to accommodate the International engine's sensors, injectors, and other components. This is a massive undertaking requiring significant electrical expertise.
* Computer Control: The engine control module (ECM) is specific to each engine. You would need an ECM compatible with the International engine and would likely have to extensively modify or create custom programming to get it to work within the Ford's vehicle systems.
* Exhaust System: The exhaust system would require modification or replacement to fit the International engine.
* Fuel System: The fuel systems are different. You would likely need to adapt the fuel lines and potentially the fuel tank depending on the International engine's requirements.
* Cooling System: The cooling system might need adjustments or replacements to be compatible with the International engine's requirements.
In short, while not impossible, the amount of custom fabrication, electrical work, and engineering required to swap a Ford 7.3L Power Stroke with an International diesel makes it a hugely impractical project for most people. The cost and labor involved would likely far exceed the value of the vehicle. It's far more realistic to rebuild or replace the existing 7.3L or find a donor vehicle with a suitable engine already installed.
