Well, the Big White Hooptie failed the annual state safety inspection. After 30+ years of use, the driver's side seat belt is frayed. I've found a company that will rebuild my seat belt assemblies with new color matched webbing, but I got to get the the assembly out to ship it to them. It seems that its a huge Torx fitting that secures the belt to the floor pan. Does anyone know what size this is? Its a 1981 Buick Regal Limited.
I've used large allen wrenches before to remove seatbelt bolts. It's big enough that stripping is less of a problem. I find the tightest one I can. Before loosening I tap on the head of the bolt with a large hammer to free what can be freed.
Worth a shot?