I'm aware of the stock oil pressure sending unit. However I want to leave that one alone. I have an Autometer oil sending unit 1/8" NPT thread do you know where I can install that one.

 

I think the top of the reservoir is 1/8"..

 

the top is 1/8" straight thread not pipe.

 

Gotcha... I drilled and tapped the side of my reservoir for my temp sending unit.

 

How well does the temp sensor work there. I'm very interested in adding an oil temp as well. Did you just grease the drill and tap to do it or what. Where did you put it in the side. (pic maybe).

As for the original question.
There is a pressure port to the left above your engine oil filter. Get a 1/4 to 1/8 adaptor bushing and your all set.

 

The pic shows the location near the oil filter
blockpress.jpg pictures from trucks photos on webshots