In the FAQ section there are posts about seat belts:
http://67-72chevytrucks.com/vboard/s...d.php?t=646002
Aftermarket Seatbelts???
a long thread about seat belt options
Seat belts for stock bench seat, purchase and install info
a thread with information about a aftermarket seat belt kit for a bench seat, with photos.
1965 Seat Belts??? : July 2010 /60+ posts
anybody make the seat shoulder bolts : November 2013
1966 shoulder strap cab holes : April 2011
Seat belts???? : August 2014 /+15 posts, some photos and scanned diagrams
(what is) the best 2 point retractable seat belt? : September 2014
66' 3 Point Seatbelts_B Pillar Plug... March 2014