Seat belt laws?

I'm still driving with the lap-belt only, but unless you have a show car or REALLY want your car period correct, swapping in a 3-point is a good idea. You can get them from almost any late model car in the junkyard, just be sure to reinforce the inner roof behind the mount. If you have the shoulder strap already, should be a piece of cake. When I was a kid, nobody wore seat belts, it wasn't required by law. Now I feel naked without them. Think about what your head and chest are going to do if you slam into something head-on. I guess I'm getting old, but a 3-point conversion is first on my "interior" list.