I dont have an oil pressure guage at all in it. Sorry I didn't state that. The Plug I was talking about, is right near the timing belt i believe, or atleast it was on my D Series motors, but I'm guessing not to put it there.

So I just pull the sensor out of the back of the block, and just run my fittings out of that then?

My Guage isn't new either, My dad and I picked up a 77 F150 Ranger XLT a few years ago, with a 460 in it, he wanted more classic style gauges rather than what was in it. So I kept this one.