Thanks, guys. I think I have an idea of what to do now. Once I get back to the shop I'll mock up the rack and see how it looks. From what I understand, Mustang II only refers to 74-78? I'm pretty sure these parts are from around that time. The guy that pulled them forgot what year the car was, so it gets a bit confusing when I order parts or start welding stuff to the frame.
Thanks again, guys.