It would fix the problem of breaking 1st-5th... however, you will now be breaking center diff transfer gears and everything on the back side of the driveline. And you would have to do quite a bit of suspension tuning to make it handle well, or it will tend to be very tail-happy.
-Dump a lot of money into a proper rwd swap
-Dump a lot of money into PPG gears
-Dump a lot of money into a 6mt.