275/60/15 on rear of Duster/Dart

Yeah, ok, I didn’t see the sport qualifier in the original post, but since I did mention I was talking about a 68, the OP would also know I wasn’t talking about the same car either.

Lots of assumptions there.

Every time someone starts one of these threads, somebody with the wrong make/model car chimes in and says something that isn't relevant for the OP. Some people just don't know, that's fine. But the OP may not know that his car and your car are different with regard to tire fit, and that's why I corrected you.

You're the one that got defensive. If you don't like being corrected, don't give bad information.