Check out http://www.fatmanfab.com/06page19.htm. They sell a kit that uses a lot of SN95 parts. I've heard of using Fox and SN95 parts though. There was someone out ther a few years ago that welded a '79 LTD subframe (same as fox Mustang) in his '69FB, and he liked it. The SN95 parts are direct swap on a Fox car, since the SN95s ARE Foxes so it should work. DVS Restorations' MIB 68FB used a complete 99 Cobra front suspension also. I'm interested in seeing how this turns out.
HTH
HTH