Hey Long.1,
Which ICC you have? Probably prestige sound with color LCD? Do you have the little slits next to your LCD, on the right-hand side?
I find it may be significantly easier to mod the mono-LCD setup, especially wrt space for fitting a 7" screen.
With a DualZone ICC, I would say max tft touchscreen that will fit would be 6"
Keep us posted, I need to start a Project Log too.
Will do so tonight, and then we can share ideas.
edit:
Here is a link to my Project Log if you want to see what I am up too
Regards,
Beanie.