Ok where to start.....
First things first. You can throw away or sell the awd tranny. You will never use on that car. Also being a 95 that is an obdII car where as the engine you are getting is going to be an obdI. You will most likely have to swap wiring harnesses due to the obdI and obdII plugs being different going into the ecu. The obdI ecu will have a smaller blue connector where as the obdII will have a larger white connector on the ecu. If your motor comes complete with wiring,ecu, and all you shouldnt have that hard of a time getting it going. you can use the factory det ecu if you would like. I use a jwt ecu on mine (but Im still on the stock de). If you need help check out www.sr20forum.com. If you are not very mechanically inclined and have the money, I would have jay (v8killer) do the swap for you. He has done several swaps and they are the cleanest you have seen. Good luck on your project.. Also get the 255lph walbro. Dont settle for the 190. No point in replacing the same part twice later. Do it right...do it once, Do it wrong..........do it twice.