[Scottio57]

Common knowledge in tractors and earthmovers may apply here. If your vehicle has a roll over protection system you need to be belted in but if your vehicle is open with no ROPS you do not want to be belted in so you can jump free in the event of a roll over. I drive a Roadster and in the event of a crash and the likelihood of a rollover I do not want to be strapped in but the possibility of being ejected is more likely. However my model A sport coupe with some sort of roll over protection a seat belt may be prudent. So, with a hard top you may want belts and with a open car you may not want belts. The likelihood of being in an accident are “relativelyl” low but you want to take precautions. These are very old cars with no built in safety cages. I guess the whole car can be considered a crumple zone. We accept the risk to enjoy our cars. I guess it’s a lot like riding a motorcycle in that way. Drive with safety in mind. Use your experience. That may be your best safety feature.