I put Wheel Vintiques “Chrome Hot Rod Rallye wheels on my ’63. Not sure about what offset they are. They are 14″ x 6” with P215/70R14 BF Goodrich Radial T/A’s in back and P195/70R14 in front. The slightly taller and wider rear tires give the car a slight rake. See photo. There is about a finger’s width between the tire and the wheel opening trim on the rears. I wouldn’t go any bigger than this unless you plan on tubbing the wheel-wells. I haven’t had any interference with any rubbing. You might do some research on what the offset is on these wheels and use that info. to find wheels you like.