B18c into a 91 integra

I was planning on swapping a b18c into my 91 teg and I was wondering how difficult it would be? I think the mounting points are the same, and the shift linkage is too. And i know i'll need a cable tranny, but what im really wondering is how different the wiring is, has anyone done this swap before? And how much would it cost to have the wiring done up?