my first choice of engine for a transplant into my bmw e30 was a 2.5 twin turbo from a skyline but was advised against by 2 different garages about using jap engines because the electrics involved can be a nightmare so i ended up going the cossie yb route and that received a mixed reaction from the other e30 owners in the club.some recon id ripped the heart out of my bmw and concidered it almost a hanging offence to see a ford lump under my bonnet i think you'll get even more grief as jap stuff seems to be held in even lower regard as the cossie yb.a popular engine to use in conversions is the e34 m5 engine or even the 8 series 5.0l v12.try www.e36coupe.com for starters and good luck