Yo kris..I have the autometer gauge going on the ZC, along with keeping the factory idiot light... so here is what I did....using ideas from Endyne's (aka. The Old One's) site - I plan to run this line to a "T" that is mounted to the firewall, with the OEM sending unit, and the autometer sending unit.
Here is the link to Endyne's article -
http://www.theoldone.com/articles/oilpressure/
My pic is a little clearer, but the 913EFZC's diagrams are better.

- I am lucky that my shit is out of the car on a stand, but unlucky that I don't have it in yet