Thanks for the kind words. I made the plate out of 1/8" aluminum and powder coated it with Eastwood satin black. I gutted the ash tray and lighter assembly with a bare hacksaw blade to make clearance for the gauges.
As Jeremy said, the oil sensor is threaded via a 12mm o ring adapter into the filter housing and the boost gauge is connected to a fitting a drilled and tapped into the bottom of the intake manifold.
I'm about 90% sure this is the adapter I bought...
http://www.egauges.com/vdo_indA.asp?PN=R7962