The original Z/28 was first introduced in Dec. 1966 for the model year 1967. Brain child of "Vince Piggins" who created the race-ready camaro that was superior to the mustang. He took a 327 block and installed a 283 crankshaft creating a 302 cu.in. Unfortunately only 602 were produced the first year. This keychain (3" x 1 1/4")is nicely crafted,single sided, after the 1969 Z/28 emblem which many agree was the coolest.