Thanks. I don't have measurements handy, although it seems like a large enough space to hold three gauges (oil pressure, oil temp, boost?).
A good picture is in the middle of the page linked below. Vent gauges are nice when you have no alternatives, but with this big, gaping hole in the dash, gauges would be a visual and functional improvement.
http://images.google.com/imgres?imgu...icial%26sa%3DN