A 1968 Shelby GT500KR in Acapulco Blue sits inside a Phoenix restoration shop with its original body and interior intact, but its 428 Cobra Jet engine has a story of its own — the factory motor was destroyed drag racing decades ago. Owner Tony Arme of American Legends Hot Rods is bringing it back to 1968 condition piece by piece. Find out why collectors still call this one of the most significant KR builds on the shop floor.