Tony You have to run the exhaust from both sides through the turbo, kinda like a Y pipe.
Check out this
link. This is currently the only single turbo kit available for Z06's and C5's. Yeah, yeah, I know its not a stang, but everyone at that shop has at least one Mustang.
They custom built that kit (starting from scratch) for the Z06 in less than a month. I know one of the guys there has a single turbo kit for a fox body, for sale if anyone is interested. They definately know what they are doing.
Andy