I need help with tire size

This is a 235-60-15 on a 6 1/2" rim. It cleared View attachment 1715381850 View attachment 1715381851 fine. I had .920 torsion bars, a 1.25 sway bar and KYB shocks.
(Before I knew how shitty KYBs were compared to Bilsteins!)
Yeah but that's a Duster. His '67 Dart has a lot less room. 215/65-15 is what I'm going to recommend.