67-69 Dart front wheel backspace question?

205 is not too narrow for a 7" rim...they'll seat with no issues, and they'll ride handle and wear normally unless over/underinflated. I ran 205/65/15s on my Mustang with 15x7 turbine style wheels years ago because they were free and I was a poor teenager-absolutely no issues. What can get you is the aspect ratio...with a 205 cross section tire, anything less than 55 probably wouldn't seat very well.

Sure with a tall wall a narrower tire would fit too and I've seen people fit all kinds of stupid size on the wrong width (I'm talking about the negative camber, stretched and pulled "look at my bead" crowd). I guess my point was if you're buying tires get the correct size for the rim. If it we're me I'd either get a 6"-6.5" wide rim for the 205 or buy a wider tire for the 7" ignoring ones financial position at the time. My 92 GT Pony rims used 225/55/16 at 7" wide.