I think they're the same. Here's what Dante's lists. There seems to be no differentiation with or without a vinyl top. Call them to be sure. Dante's has great customer service. DMPS-6391-70282781 Mopar Rear Window Gaskets -1967-1976 Dodge Dart 2/4 Door Sedan/74-76 Valiant - dantesparts.com
And it's cool you're going back with the vinyl top. A lot of people don't. I think it adds some class to it. I do have some advice though. Prep and paint the top just as good as you do the rest of the car if you want it to last.
