You'll also need the oil pickup and I'd stick a new sump gasket and pickup gasket while you have it off. Make sure the loom is in good nick and was originally from an e36 otherwise the ecu will be on the opposite side for instance if it was from an e34. That could make things messy trying to fit the loom inside the plastic cowling. You'll want an e36 dipstick too and probably a prob shaft unless your keeping your old gearbox. Much easier to buy from an e36 breaking and get a price on all the parts.