Wondering if anyone is running a oil pressure gauge. If so how is it plumbed?

 

That depends on what kind of oil pressure gauge you would like to run
Electronic?- they will give you a sending unit with more than likely a 1/8-27 npt thread on it, the Manual that comes with the gauge will tell you where to install it on your specific truck (if you buy a truck specific gauge)
Manual? Hook the hose to the correct port on the engine. And call it a day
( never put one on a 6.4 so I do not know where it specifically be hooked )

 

It's a mechanical auto meter. There isn't one on the dash so I'm looking for a little piece of mind. I just can't find a place to hook it up.