it looks like for 1969:
Barracuda offered both the T74 E70-14 "white streak" fiberglass-belted & T75 E70-14 "red streak" fiberglass-belted tires

Dart offered only the T74 E70-14 "white streak" fiberglass-belted tire

shruggy

anyone have anything that shows T75 available on Dart, maybe late in the year??

"carteravs" did your Swinger come from a stand alone Dodge dealership or a Chrysler/Plymouth/Dodge dealer