A great customer of ours made an amazing write-up on how to guide that is available via IFIXIT.
His guide documents how to replace the seats in a 1999 Ford F250 F350 F450 Super Duty with the newer style 2011 - 2016 Seats.
You can see all of the seats you can swap into your older super duty here!
Click Here To View The Super Duty Seat Swap Guide by JodyNoles