Most all chevrolets are the same (14" & 15"). for sure 1957 through 1985. The 1963 Impala came with 14" tires with a 5 bolt pattern of 4 and 3/4 inches. Lug nuts took a 3/4" wrench to remove on a 7/16 bolt. The way you measure is: skip one and measure from outside of one bolt to the middle of the other.