On the rear you can easily put a 245-60-14 or a 235-60-15 without much problem. On the front '60-'62 cars are different that '63 and later (that another poster mentioned) in that the front fender, in front of the front wheel, rolls under the car farther and into the tires way. Because of this wheel offset is critical when choosing an oversize tire. You can use a 205-60-14 on the front of one these cars on wheels with a factory offset. Any deeper wheel and they typically rub this front part of the fender as VDART suggested. If your going to run deeper wheels you may have to drop down a size or two, or use 50 series tires if ride quality isn't an issue.