E30 Zone

I'm sure this has been asked before, I just can't seem to get the search function on the forum to work right now (it's my browser problem NOT the site itself I think, and i'm getting desperate to get this sorted!!) but can someone lend their knowledge base to me in regards to swapping my M40 318 to an M42 318is lump.

UPDATE: Thanks for the advice to those who offered, all sorted now.

This can be locked please - The monster we've created in the lab is finally alive!!!