I am told that with very little modification the seat tracks from an early 60s Stang will adapt to virtually any Mustang seat. One guy at California Mustangs said using the original tracks on a late 90s Stang seat will allow the seat to work in the 60s car and is not that hard to convert.
I hope he is right because that is what we are planning to do so we can recline while we cruise!
Neal