its supposedly an easy enuff conversion, but ull have to get all the 4age wiring loom and play "guess the wiring game" to match everything up (and im assuming ur using aftermarket computer?). also another issue is engine mounts and gearbox.....
PM Dohca about it, he just not that long ago put a 4agze into his AE86, he can tell u waht the ups and downs of it are....
or go visit the
www.clubk.co.nz website, and ask a few ppl that have actually done the conversion on there, theyll prolly be a hell of a lot more help than playing guesswork and stuffing it up....
also, let me come have a look at it, im j ust jealous of the fact u have an SR and i dont