Bob thanks for clearing the 67's from Des Moines up. So to get back on thread was the Firestone, Sup R Belt, Super Wide Oval Sport, WSW F70-14 an assembly line tire for mustangs with the heavy duty (not competition handling) package when F's upgraded the E series standard tire? It appears that there was also a Firestone Deluxe Champion tire available both in 67 and 68 so was it an either or, or a plant thing, or a time frame thing? Could the Goodyear Polyglas F70 have replaced the Firestone at the plants making CJ's late in the model year or has there never been a documented example of this on an unrestored car?