So after a false start I got the Corvette to work the way I wanted to.
I started with a GMOS-100 from Metra, and take it from me for the Corvette it's crap stick with the PAC OS-2C-BOSE.
The second problem I ran into was the "nub" the stock radio mounts into. The Z140BH is actually a bit long and would hit the "nub." Removal with a saw was required. This also freed up some room to mount the PAC CM1 Module the Metra ASWC Module and the PAC OS-2C BOSE near the HU. The Camera "module" was mounted above the driver footwell.
The XM Module was placed in the rear of the car where the stock XM Module was. Sadly the stock bracket could not be modified to work.
All components are held in place by 3M Dual Lock, I recommend it to anyone.
Anyway here are a few pictures:
I used a dremel tool to provide some relief on the upper side of the unit. The door was a tiny bit tight in opening and closing.
The XM antenna is hidden in the cargo area, since the car is fiberglass there is no need to externally mount it.