[knightrider]

ok well the stock seatbelts, and mounting locations are tested from the factory to withstand a 3,000lbs load for 30 seconds, and considering the seatbelts that are used for the conversion are from newer s14 models, use maybe a 1/8" max of washers and have rated bolts, i think your whole point of the used seatbelts being unsafe is rather mute, you obviously have no backround in engineering. also the use of a rigid harness limits the movement of the body, and in the extreme forces you are supposedly going to be subjected to in an accident would most likely snap your neck. i dont know whose seatbelts you have been looking at but i dont think i would be riding in any of your friends cars if that is how they choose to carelessly install thier safety equipment, i used only the factory mounting locations, with the factory bolts.