GL it's a big undertaking, there are wiring diagrams for the mkII mr2 3sg(t)e swap but if you get a celica motor I may be able to help you out cause it is what I have in mine out of a st183 (the non turbo 2wd early 90's celica) The mounts for the celica and mr2 are slightly slighty different, they swap over easy but it was only the other day I found this out when I put a celica engine in my mkII and it had a lean on when I put the bolts in
