I just finished installation of 3 point seat belts in my 63 C10. I bought the belts from Seatbeltplanet. I bought from them when I did my 1965.
You can review my DIY here.
Seat belt DIY. [
lugnutz65chevystepside.weebly.com]
Someone who used my DIY commented that he was able to install the shoulder belt anchor without tack welding the fender washer/nut assembly to inside wall of the B pillar. That made me rethink my methods.
So I will update my DIY soon with the BETTER way.
In my 1963 I used epoxy to glue the nut to the fender washer. I then strapped the appropriate size crescent wrench to a heavy duty paint stick. I used a very small amount of masking take to hold the fender washer/nut to the wrench. Just enough so I could release the wrench once everything was tightened down. Works great. A whole lot easier than welding the nut to the washer and then the B pillar sheet metal.
I still recommend doing the install with the gas tank removed because the gas tank filler neck is in the way on the driver’s side. I struggled for over 30 minutes trying to get my filler neck repositioned while the tank stayed in place.
