Here are some pics of my radio cage and disassembly of my Xenarc 8" LCD.
Monitor came apart easily by removing the four corner screws and prying the back off.
Disconnect the speaker wires from the motherboard and move the back out of the way.
Disconnect the button board, I left it mounted in the case for now. I will attempt to remount in the car. According to Xenarc the LCD panel will work without the board attached.
Remove the six screws holding the LCD to the front of the case and it is now apart.
I need to modify my radio cage by removing a portion of the top shelf.
I still think I am on the right track using the 8" LCD panel. Looks like it will fit perfectly.