Not sure if I have this in the right section lads so feel free to move it if not..

Swapping out my 318is in the e36 for a 325, first time doing a swap in a BMW so is there anything I need to know that's a MUST need to know.!! Swapping in engine, box, loom and ecu. Anything that I need to do while I'll have the lot out of the car on and the rack apart from oil and a general service of oils and check pipes and lines. All do's and do nots welcome lads first time doing a BMW swap so anything will help