Do a search on buddy seat mounts or mounting brackets.....yes some people have done it and some on here made a pattern to make the missing two inside front bracket you need to mount in a later model Squarebodys....some info for you......
http://www.73-87.com/7387garage/inte...ry_buckets.htm
http://67-72chevytrucks.com/vboard/s...d.php?t=374352
http://67-72chevytrucks.com/vboard/s...d.php?t=562904