D70-14 or E70-14: your modern equivalent is a 205/70R14. Right at 25.3" diameter. If you are really stuck with 14" wheels, I think I'd go bigger to 215/70R14, which would be 25.8".
I was leaning towards 225/65/R14 a little taller I think, but wider like I wanted them to be to begin with!
Honestly, I just have the 14" rims because I wanted what Mother Mopar would have put on this car had it been a factory rallye wheel car. I think they look okay, and they don't look small other than it sitting on the ground.
