I wanted a pool ball shift **** for my '03 GT, and had to buy an entire set to get just one! To try to recoop the cost, I've got the others listed on eBay. They are drilled and tapped for a Mustang, and are ready to screw on. I'm pretty certain they're the same shaft size for 79-04. Check out my link below.
Thanks! Adam.
http://cgi6.ebay.com/ws/eBayISAPI.dl...&since=-1&rd=1