Here are some links I found in the past that referenced the 67-69 Camaro/Firebird's and the actual location of a shoulder belt installed on convertibles. I also think that aftermarket belts can be purchased through Jeg's and Summit, but this information was given to me through word of mouth.


http://www.camaros.org/options.shtml

http://www.camaros.org/seatbelt.shtml

http://www.camarocentral.com/product_p/int-1033.htm