* Different Engine Mounts: The engine mounts on the Crown Vic and the Mustang are completely different. You'd need custom engine mounts fabricated.
* Transmission: The Crown Vic likely has a different transmission (likely an AOD automatic or a C6 automatic) than the Mustang GT (likely a T-45 manual or a 4R70W automatic). Even if you found a compatible transmission, the bellhousing and driveshaft would need modifications or replacement.
* Wiring Harness and Computer: The engine's wiring harness and computer (ECU) are unique to the Crown Vic. You'd need to either extensively modify the existing Mustang harness, create a completely custom harness, or use a standalone engine management system. This is a significant undertaking.
* Exhaust System: The exhaust system from the Crown Vic won't fit the Mustang's chassis. A custom exhaust system would be necessary.
* Cooling System: The cooling system components are likely different and incompatible.
* Accessory Drive: The placement and configuration of the alternator, power steering pump, and other accessories may not align with the Mustang's accessories or mounting points.
While theoretically possible with extensive fabrication, welding, and electrical work, this swap would be incredibly complex, time-consuming, and expensive. The cost of custom fabrication and parts alone could easily exceed the value of the vehicle. It would be far simpler and more cost-effective to source a suitable 5.0L engine that is already compatible with the 2000 Mustang GT.
