In his model Celica, it would be a pain in the ass to put it in. The ST trim came with a 4afe. To put in a 3sgte I believe you have to cut a weld 1 or 2 mounts in order to swap it. If he had a GT or GTS it would be an easy bolt in swap. Wiring would be the challenge but not too hard. I would suggest buying a GT or GTS with a blown motor and using that as a shell or just find someone selling their swapped GT or GTS.