FWIW, I've got SBP Keystones on my '72 Dart, but they're a vintage set I got off Craigslist. The rears are 14x7" and IIRC they've got 245/60R14 BF Goodrich Radial T/A's on them (came with the wheels - the prior owner had them on a Duster). They do clear the stock fender well on the '72, but it's pretty close.
