Tire Size Suggestions

I was also wondering the same question myself? I have a 1967 Fastback Barracuda. I want to buy either a set of Crager SS Wheels or the Rally's in a 15x7 for the front and a 15x8 for the rear. I hear people say the largest tire I can use upfront is a P225/60/15 and a P235/60/15. On the rear I hear I can use a P245/60/15 and a P255/60/15. What is anyone's experience here with this? I want the largest possible size without having a Hit and rub issue on my car. I want to use BF Goodrich Radial T/A's. Please advise....Thanks. Ohhh....I have Super stock springs and the wheels are small bolt pattern.