Quote Originally Posted by pro70z28 View Post
Are you planning to mount the shoulder harness to the floor? I might be misunderstanding. The harness mounting point should be up by the shoulder (see how factory shoulder belts are mounted). If the mounting point is low a forward crash could compress your spine, as tech mentioned early in the thread.
Yes, my shoulder harness mount will be anchored to the 1x1 tube frame just above the belt line, at the top door hinge point. This makes it a body mount, which then drives all other seat and seat belt points to be body mounts, too. The only safe way, in my opinion, to mount to the frame is if you build a total frame mounted cage assembly, including floor pans, that the body fits over. If I had such a cage system my choice would be to stay with the frame and allow the body to go its own way, like a AA Fuel Dragster. The issue, again in my opinion, is to consider the point where the body (God forbid) separates from the frame, and at that point if you have mixed your anchor points, some to the frame, some to the body, then the seat belt system is going to be the cotter pin trying to hold the body/frame together (I like that, Jack!!), and the passenger is going to get squeezed.