my only concern is
liability issue. If something ever went wrong and i had a accident and it was cause of death in that seat belt that was modified would the state come and prosecute me. I no I can have my race car chassis guy to do the welding on it. Just been looking threw google has to offer laws ect on retro fitting seat belts and cant seem to find a legal answer. I can't see why I couldn't do it if I was making it safer then it was factory.
Still tossing it up but I did list the truck for sale while I debate
http://lasvegas.craigslist.org/cto/2815903475.html