1967 Dart GT Convertible How Rare is it?

There is no way to know "how many are left" unless someone kept tabs on all 3700 of them.

For extremely limited production, like 500 you can almost do it, but with thousands and thousands, no way.

I think it;s kind of funny to hear people speculate about how many of a certain model "are left"

Unless it's a Daytona or a BO Hemi Barracuda, etc there's simply no way to know.