Nothing about this Corvette’s original build sheet matches what is under its hood today. The factory small-block has given way to a 383 stroker with an upgraded transmission, suspension and cooling system, wearing dark blue metallic paint over a restored leather interior. The stock 1981 engine made 190 horsepower. This one claims 500. Read on for how that gap got closed, and why 1981 was one of the strangest years in Corvette history.