REiDY

Hey guys I've been going through the posts and can't find a few answers.. I have an ae92 csi corolla hatch that I'm putting a GTI cluster and dash into, I'm curious what oil pressure unit I need? do any of the stock loom plugs fit into the cluster? If not, what do I need to do? Also my car didn't have a stock tacho and the GTi cluster does, can I use the signal wire I was using for my monster tacho for the GTi tacho? Or is it already In the stock loom? Thanks again