You know heads-up, no-breakout bracket racing has reached its proper place of prominence when guys like Carl Smith will spend six months and 20 grand building plastic fantastics like his latest ’57 all-’glass “Super Gas” Corvette. We say all-’glass because Carl made the grille and headlight and taillight buckets out of fiberglass, too. But that’s not all. Smith shaped the chassis (featuring a 2x3-inch frame, Lamb front end and brakes, Pinto steering, and a ’57 Poncho rearend), the engine (employing 427 inches of Arias, Bill Miller, Crane, Edelbrock, and Holley-equipped rat), the interior (fashioned from Wayne Gaskamp-shaped aluminum), and the exterior (covered by an eye-opening array of candy pearl yellow, red, orange, blue, and wine). If Carl’s Custom Corvette proves to be as quick as it is colorful, the boys…