Tire options limited------------

Stopped to talk to the tire store about tires for my car. I have 15" X 6' mopar rally wheels for my car and his recommendation was for 235-60R-15 all around. That tire is only 26" tall and I was hoping for 245-60R-15 on the back and something smaller on the front. Car is 67 Barracuda with stock springs, hangers and wheel wells. Opinions please???????