this is my first bmw (i use to be a vdubber) so im not sure what is compatible and whats not. so with that said i was wondering what range of 318i years would the differential and oil pan be alright to put on my 91 without any complications? i was second guessing taking those to parts off an 84 the differential look the same but oil pan was completely different...the bolt holes looked liked they would line up so i wanted to ask before i went and messed my car up by doing that. (and by the way its just the lower oil pan)