Tire Size 68 Barracuda

Factory 14” wheels? What widths are we talking here? Because most likely the biggest tires will be completely dictated by the width of those rims.
I’m going to have to measure bc I’m not sure. I’m not fluent in this topic as many of you guys so I’m doing my best. Here is my car now. Definitely would like to put 245 in the rear but again, not sure if they’d rub or not.