Seat belt question

[tommy217xxx]

I'm switching my truck from lap belts to shoulder belts. The truck has the holes in the b post for the shoulders. I grabbed some belts from an 87 but I didn't get the bolts for the shoulders. My truck is a 76. I know I'm gonna have to make an adaptor plate for where the floor mechanism goes b/c they mount different. I also didn't get the male side of the center lap belt.


What size bolts do I need for the shoulder belt mounts? And can I use something like this for the center? What length is the center belt?

http://www.seatbeltsplus.com/product/1256-60.html