where to tap for oil pressure

Mine is set up like LiquidGT suggests. I dislike having dead gauges in the dash.

As far as pressure mine runs about 50 at cold idle and 30-35 at hot idle. When I am driving it is usually around 60-70 PSI when hot. But the minimum that I would like to see is 20 psi at hot idle and then at least a 10 psi increase from there for each 1k rpm increase. So at idle 20 psi, 1700rpm 30 psi, 2700 rpm 40 psi and so and so forth.