No, I'm sure some did.

But proper ones would have been welded, when built for teams, Ford themselves etc......

At the end of the day, it was probably a privateer car built to do single venue stuff, so it's no surprise.

Perfect for you, but I would never have a car with a cage like that. Since you're doing nothing other than turning it into a show car, then it's fine for what you want, even if it is a little on the pikey side!