Guys, anything is possible.
AWD- your floorpan would have to be drastically changed, and if you have to put a driveshaft in a little off center, you're going to loose some foot room for you or your passenger probably. You also might have to pull some engine bay space out of your ass to put in a transfer case.
RWD- have a custom adapter made for a tranny that you buy from another country and ship over. Fab engine mounts to turn the engine sideways. figure out how the hell to redo the front suspension without the FWD setup.
Either way, with the rear wheels driven, you are going to probably need a bigger transmission and driveshaft tunnel to clear the mechanical bits. The dash might hide the extra intruding firewall though. Your gas tank is going to have to go, because it's in the way of the driveshaft. It's either custom tank or fuel cell time. Your spare tire gets the boot (from the boot! <img src=/images/forums/snitz/smile.gif width=15 height=15 border=0> ) because you need a differential there, unless you figure a way to squeeze it in and still have any suspension travel. Then you need to figure out how to do the suspension for the back.
This will either take a LONG a$$ time or a couple of cubic dollars. I was thinking the other day as I sat behind an old impreza that that would be the car to steal a driveline from, but then you get to figure out all the custom everything associated with mounting and electronics.
But with time and money all things are possible. Heck, there's a company that will, with your PT cruiser and $100000 give you a viper V10 and RWD setup. I actually did some measurements a while back and the V8 setup in my truck would probably fit the lantra with minor additional footwell intrusion.
You might need a few hints from God himself when it comes to getting that suspension right with a V8, though! <img src=/images/forums/snitz/laugh.gif width=15 height=31 border=0><img src=/images/forums/snitz/eek.gif width=15 height=15 border=0>
<hr width=60% noshade size=1 align=left>Yes, you.