Above, He's leaning on is not the Fiberfab Centurion I thought it was, based on the sidepipe location and the stingray badge. Those are the same one the 2 Fiberfab cars.
But the many people who knew that this was the Elvis movie Clambake had it figured out, and since I haven't watched many Elvis movies past Jailhouse Rock, it's a surprise to me that the car is the XP 87 http://www.corvettes.nl/gm_prototypes/xp87/index.html
above 2 images from http://www.imcdb.org/vehicle_11067-Chevrolet-Corvette-XP-87-1959.html
Below has to be a still from a movie, how would anyone be on the scene of Elvis crashing his motorbike into something and taco'ing his front wheel?