Only twenty buyers checked the box for Chevrolet’s most serious 1967 Corvette engine option, and the horsepower figure on the window sticker was deliberately understated. This custom convertible takes that same idea and reworks it with five decades of engineering the original buyers never had, wrapped in a paint color that did not exist when the car was built. Shark Gray over black, a modified 427 Z06-based engine, and a question every restomod eventually has to answer. Read on for where the line actually sits.