you sound like you have the resources to get everything tuned properly, so i would definitely go with a turbo. if your looking to get the most out of it, and have room to work with i would go with a t63e (precision) or any t76. i have my mind set on a turbo, i just have to find out what kind of cam to run, and what turbo's like. good luck and GET A TURBO
ps. go to
www.turbomustangs.com 6 months ago i knew nothing about turbos, since then i have read about every single post on there.