'98 Tranny In A '93?

[SuperCoupe400]

All i know that's different between these years is horsepower, torque and a 4-speed auto vs. a 5-speed. Is a straight swap possible on just the tranny - leaving the '93 engine intact?

I know the first person to post will ask me why I'd want to do just the tranny and not the engine too - no particular reason - just humor me. This is all purely conjecture right now.

thanks