Here's what to consider:
* Engine Type: Both years used the same basic engine families (Mitsubishi 3.0L V6 or the turbocharged versions). However, there might be minor internal differences between the 1991 and 1993 versions of these engines. These differences are usually not show stoppers, but you'll want to check for compatibility.
* Transmission: This is arguably more important than the engine itself. The transmission must be compatible. Automatic transmissions are usually the more challenging to swap. Manual transmissions are often more straightforward. You'll need to ensure the bellhousing bolt pattern and transmission output shaft match.
* Wiring Harness and ECU: The engine's computer (ECU) and wiring harness might be different. This often requires adapting the wiring harness or using the 1991 ECU (which might necessitate further modifications).
* Mounts: While the engine mounts are likely similar, there's a small chance of minor differences requiring modification.
* Exhaust System: The exhaust system might need some adjustment to fit properly.
In short: While it's *possible*, it's not a simple bolt-on swap. You'll need to carefully compare engine and transmission specifications. A professional mechanic experienced with these cars would be able to assess the feasibility and estimate the necessary work. Don't assume it'll be a plug-and-play situation.
