hi I got a 97 outback wagon 180 thou plus that needs a tranny subaru said that one out of 12/95-7/97 will work is this true and if i was to change motor and tranny together what years can i use and do i have to change computers if differant years and could i put a ej20 twin turbo w/ tranny in this wagon it now is a 2.5 if so how much hassle thanks swade