What does it say on the rear quarter panel??
California Special, it's a limited run car only made in 1968.
It got, Shelby side scoops, Shelby Convertible rear fender extensions and wing, Shelby driving lights and hood pins, Deluxe bonnet, stripes, pop open gas cap, Thunderbird rear lights as used on the 68-70 Shelbys too) and then any options available for that year, were available on the car from a straight 6 to a 428 cobra jet.