How different is the wiring on a BMW 320 compared to a BMW 325i engine?

I am converting my BMW E30 320 to a 325 and the plug between the loom and the injection manifold are different and i was wondering what i need to do to convert the engines. Any suggestions would be gratefully received.|||you should find everything you require here...www.bmwcarclubforum.co.uk|||Will be the same wire ring loam