Sent some pics to your email Joe.
But for others with the same question: the two pics below are both factory ducted hood cars, both without the full gauge package, but with tach.
The hole above the junction block is for the ducted hood wiring. The hole below is for the tach wire. A full gauge car would not have the lower hole.
Also, pics here: scroll about 1/3 of the way down, where it is talking about RS piercing, also shows ducted hood piercing.
http://www.camaros.org/options.shtml