I concur, Bill. The seat belts may to let you comply with your state’s seat belt law, but in an accident they’re not likely to help you a bit due to the car’s lack of stuctural strength & integrity. Also, I concur to bolt them to the frame or any kind of cross membering you can find. If you do cut & sew to make them shorter, you absolutely MUST use heavy nylon thread, cross-stitched like you see them made. And, I don’t encourage shortening them either. I agree on using the large washers. I’ve seen fellows use 1/8″ steel plates like 3″x3″ for the ‘washers’ just to make sure the pan doesn’t tear through. Good luck………Dan