Oil pressure gauge question...

[Goodspeed]

Background: I'm planning on installing an aftermarket oil-pressure gauge in my car. The stock one has proven to be faulty in the past and I'd rather be safe than sorry.

Rather than mess with the inaccessible stock sending unit location, I ordered a Greddy 7M-GTE (Supra turbo) sandwich adapter that arrived today, and I have a Corolla(AE86) filter which it is meant to use to clear the frame.

So now its time to order a gauge and install the whole thing. First, here are the instructions in Japanese from Greddy:



And here is a visual guide I came across that involves a similar adapter on a Silvia

http://www.nissansilvia.com/forums/index...pic=253944

So my question is, would an Autometer electrical oil pressure gauge come with its own sending unit? Or is that something else I need to buy? If so got any recommendations?

I've never attempted this before and I don't have any experience with gauges. Between this adapter, the filter, and an Autometer gauge, would I have everything needed for this job? From those instructions, where would the sending unit screw into?

Thank ya.