I still stand by my Dirtybird unit, although I have talked with John @ Stazworks, and he definately seems like a great guy.
The unit I have is for a ford 203 to D300. Like the Staz kit, the 2nd case mount comes unwelded so you can clock/rotate it any way you want.
I really don't think you can go wrong with either vendor. In fact the only reason I went with Jed is that he had the Ford 203 (the actual range box itself!) that I couldn't find in the junkyard.
Ghost, what WB are you running? MY 302/C6/203/D300 leaves me with about a 44" rear shaft, but I moved my rear axle back 8".
Jay