Did this one weekend with a group of mates into a KE55 in about 1990. These were the days when you could get an AE86 disc rear for about $250, and it had an LSD centre in it. Happy times....
Anyway, as i recall it all went in easily enough, but I cannot recall what the steering geometry was like. You may want to look into that a bit more before letting your wife loose in it.
Essentially, it has been done many times. Have a look at a few rides threads on here and Toymods, and I am sure you will find all you need to know.