1966-1967 427 mounts on Left/Drivers side. 1963-1967 327 mounts on Right/Passengers side. Correct Reproduction, Made in U. S. A. has logos and correct washers around rivet Size: N/A Corvette Central #: 462010 Original GM #: 3797079 Car years: 1963, 1964, 1965, 1966, 1967.
