Rear tire size on a 75 Dart

The rear leafs are a little tired. Im probably going to drop the front a bit to match. Only an inch or so.
Right now the 205/75/14s are the same dia. as the 235/60/15s. 225s are 1/2 smaller in dia.
I was more concerned with the back end when I asked. I'll do some measurements on the front this evening.