CLOUD19

Gidday guys,I dont really know alot about bmw's but am desperately wanting some info.I own a 91 E36 316 NZ assembled thats 5 speed manual.Its done around 200,000 clicks and the motor is 'average' and want to know if a 320 or 325 can be dropped in without to much drama and will the manual box mate up?Also where could i source the parts neccesary for the conversion and at what ballpark cost?Any info would be a great help.. Cheers.