Hello everyone how is it going? I live in okc and have a 1968 gmc lwb and I did a seach and maybe I didn't do it right but I couldn't fine a thread or topic on mounting a 3 point seat belt. My truck has a plastic plug on the pillar where the upper door frame and the back window meet, is it possible to mount a shoulder belt to that. Just wondering cause I need something to mount my sons car seat in safely. thank for all the great info you guys provide and with out this site I would be lost, thanks again, and have a good day!