WIW Opinions on a 69 Dart GTS.

drip rail rust can be common if the seam sealer cracks and rain gets under it.

wasn't factory side molding optional on stripe delete cars?

I've found build sheets to be about 50/50 but it's quite common to find a BS for a different car with the same interior.

if the car was in FL, be sure to thoroughly check the cowl vents.
that could also explain the drip rail rust