e46 engine change

[gare30]

just been given a x reg e46 318i with a noisy bottem end 4door no ticket cant argue for free lol. As it owes me nothing might put a 328 lump init how much work is it to do can a e36 lump go in?as they are easier to get hold of going to keep the car as a family run around dont realy want to put another 318 init any other options that would be good