1968 Dart 2.8L Tires
215mm wide, but the 70 is a ratio between the sidewall and tread width. 215 70r14will be .6 taller or .3wider from the spindle to the edge of fender lip than a 205
Stock tire was like a
Standard tire size:
6.50 - 13
Tire width (mm):
165
Tire sidewall factor:
80
Rim size (in):
13
Total wheel diameter (mm / in):
594 / 23.4
and the 205/70r14 is 25.3 tall. It will register slower on the speedo (60 register as 55) as it turns slower to cover the same ground, and will act like a very slightly shorter gear in the back ie. Slower acceleration but faster top end.