is it possible to take a 5L out of a 94 GT and put it in a 2000 coupe 3.8L

 

It's definitely possible but you'd be looking at a lot of work. Do you have a donor car or just the engine?

 

yes. i have the whole car.

 

With a donor car it will be much easier but still a challenge. If you swap the k member the power train should bolt up without too much trouble. I'm just not sure what would happen when it comes too electronics such as ABS, gauges, etc. In my opinion you'd be further ahead to sell both cars and buy a 99-04 GT.

 

Having that donor will make it a whole lot easier..... Time consuming, but definitely easier. Should do a build thread.