[Longhorn Man]

First and formost... welcome to the board. You've found the right place for all the info you'll need.


If you get the VIN off the drivers side door jamb, we can tell you with 100% acuracy as to what you have.
As for the photo... it looks to be a 69 or a 70 with that grill...assuming it has never been swapped. (most likely, that's the right grill)
As for rarety, you'll never get acurate numbers.
That was an after production modification from a GM authorized company. Much like the camaros of the 90's.. GM never made convertables... they farmed them out, then sold them off there showroom floors.