well, from what my research shows, the soarer a340 is stronger then the supra a342e. the soarer auto tranny is closer to the mark 4 supras beefy stock auto. mounts would be an issue anyways, but from what ive heard, you just need to move them around on the block, i think there too far forward in there mounting position. the harness is a real whore apparently being quite dissimilar to a mk3s body wiring and closer to a mark 4s wiring. if your using your r154, the same bellhousing issues arise, it can be done, just make sure the engine isnt a front sump, lol