I cruised up to Mustangs Unlimited today to get a set of underdrive pulleys. At first I got a set of BBK billet, but when I got home I saw that the crank pulley was a piggy back type, not a whole pulley, but something I had to put together with a part of the factory crank pulley that I was taking off. I did not like that idea so I took them back. I placed and order for these and paid the difference. They were not in stock so I'll have to wait for them to call me when they come in. I'll update the blog with some photos once I'm done with the install.
I also did some research when I got home and got this info from the All Ford Mustangs site. Looks like I made the right move by going with the Steeda. We will see.