64 65 66 67 Chevelle SS, Chevelle, El Camino Original Used Big Block Engine Frame Mounts LH/RH Pair 1964 1965 1966 1967. Note: These Mounts are correct for 1966 and 1967 with Big Block and 1965 Z16 package, will work on 1964 if you are installing a big block. The mount holes have been enlarged by a previous owner and will need to be repaired to original size.