Thanks for the response, yeah I'd be concerned about window'd engine block. I'd be happy with 800HP, but I think the modifications would diminish the value of the car, and it's $15K proposition to add turbos anyway.
I'd like a Predator engine jammed into a 350 engine bay, as I just can't stand the look of the GT500's gapping maw.
Love the chassis, and the car rips pretty well at stock power levels. The problem is I'm at 7500' elevation. I'd probably be happy with E85/tune and headers - a shitload cheaper too...I think the whole purpose of the GT350 is the fact that a high strung NA motor capable of real track work. Once you start adding turbos and what not to it negates the purpose of the car, would rather buy a used Mustang GT and boost it, which is something I have contemplated actually.