* Different Engine Blocks and Heads: The Cobra's DOHC (double overhead cam) engine is vastly different from the V6's SOHC (single overhead cam) engine. They have different block castings, head castings, and virtually all internal components. You can't just bolt the Cobra engine into the V6's engine bay.
* Wiring Harness and Computer: The engine's computer (PCM) and wiring harness are completely different and incompatible. You'd need a Cobra-specific harness and PCM.
* Transmission: The Cobra likely had a different transmission (likely a T-45 or Tremec 3650) than your V6 Mustang (likely an AODE or similar automatic). You might need to change transmissions.
* Mounting Points: Even if you could somehow get the engine to fit, the mounting points likely won't line up. Custom engine mounts would be needed.
* Exhaust System: The exhaust system will obviously need to be replaced.
* Driveshaft: The driveshaft length will likely be incorrect.
In short, this isn't a bolt-on swap. It's a major engine swap requiring significant fabrication, custom parts, and a deep understanding of automotive mechanics. It's a project far beyond the scope of a simple swap, and it would be incredibly expensive and time-consuming. You'd likely be better off finding a wrecked 1997 GT with a good engine or buying a different car altogether.
