You may want to look at the Yokohama AVS Intermediate. My 68 has the 235/60/15's on 15 x 7 rallys. The rear is fine, could even go wider. The front really depends on your suspension set up. If you are using stock springs that are not sagging and your suspension is in good shape, you probably won't have rubbing issues.
The Yokohama's are a little more expensive, but for the price I think they are a good weekend warrior tire. I have heard that they wear out pretty quick though. If your car is a daily driver, you may want to weigh the extra cornering ability vs. frequency of tires changes.