1967 was the final year for the C2 generation. The 1967 model featured restyled fender vents, less ornamentation, and back-up lamps which were on the inboard in 1966 were now rectangular and centrally located. The first use of all four taillights in red started in 1961 and was continued thru the C-2 line-up except for the 1966. The 1967 and subsequent models continuing on all Corvettes since.
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From @azmie21