I would suggest going with t3's or find a different single. The powerstroke turbos are not "clockable" (you cannot reposition them) and are difficult to make work in the small confines of mustang engine bays. The dodge Holsets are a better choice, or any T04B or T04E would work.
I really like my single setup. It's proven to be very reliable, and very powerful. One day I would like to try a twin setup.
85 ASC McLaren Capri
79 Pace Car