Hello Guys, I need some tips and info about engine swapping 4g63 stock engine with a 6a13tt into i.

The questions are:
1. Will the 6a13tt engine fit on the engine bay?
2. Are the mounting points the same with a vr4 or do I have to make custom ones.
3.Do I need to swap the transfer case also since it will run on 4wd? (there is a possible conversion to AWD once the swap is successful)
4. Do I need to remap the ECU or should I just swap with a vr4 ECU?

Any tips is very much appreciated.