jesus man.....
if you think you can do it..... go for it... but there are some things to consider here...
realligning all the suspension pickup points, making a subframe fit for the rear, or making your own, you have idea how incredibly difficult that is to do.....
Ive had friends swap 3000 gt vr4 rear ends into front wheel drive versions of the same car, and that was a ****ing ordeal
converting this car to awd, especially when there arent any factory examples to source parts from will be ridiculously expensive and difficult...
get a celica gt4 motor (3sgte) and swap it.. that will be plety difficult in itself, and will probably make the **** geo almost undrivable stock... go for it...
Id like to see the halfshafts handle anything but the stock engine