Factory Sun Roof Cars

Hello All,

I am doing a little research, trying to narrow down what I would like as a project car (decently long list) and I came across this particular option on a 72 Demon/Duster

http://www.hamtramck-historical.com...shipDataBook/1972/72_Dodge_Dart_Demon0016.jpg

I have only seen one of these for sell on eBay before and thought it was pretty cool. I was wondering if anyone would have any information on these? Seeing how this folds back, would there be a speed limit for this while open?

I have also seen the sunroof that pops open like a vent on a-bodies. Was that a special option? I dont recall seeing that as an option in the data books.

I think there was also another sunroof that slid back and revealed the opening, similar to the sunroofs on the 69-70 chargers.

Were these only on the "sport" roof cars (duster, demon, dart sport) or could you also get them on the regular dart and valant roofs?

Thank you for any insight/help