i was wondering how much work it is to swap the e36 m42 in the e30? can i use all my wiring and ecu? or do i need all the e36 wiring? i don't think there is much of a difference besides some year they started using knock sensors if it was one with that i would need the wiring and stuff from that car right? i know this swap has been done but is there a cretin year i would need to use? and the trans is the same in the e30 and e36 m42 cars? also thinking about a lsd now my car is a open 4.11 what about a 3.73 lsd? how much lower will my rpms be going 60mph?