Ok, now I understand...
With that said, this last part is where I personally think the idea falls apart...
Look at how the factory installs a dash (through the windshield) versus how you have to do it after the fact.
Invasive as hell if you ask me, anytime I've had to pull a dash on previous vehicles, I've seriously considered selling the vehicle instead.
But I think you're right, it IS possible, just not at the price Delta in parts.