There’s no shortage of Shelby Cobra replicas to choose from, but nothing beats an original, like this 1963 Shelby 289 Cobra set to be auctioned off by Mecum at the firm’s sale coinciding with next week’s 2023 Monterey Car Week. Bearing the serial number CSX 2100, this Cobra is thought to be the 100th production car built after the initial Cobra…