[1963DUCE100]

I knowthe stock tire size for the 62 was 6x13 What is this in P-matric size? The car had three diffrent sizes 155/85r13 175/85r13 and 185/85r13, if my memory is correct.The local tire shops have not been much help they will sell ya anything that fits. I'd like to know for comparison of height and with,
Thanks