Is This The World's Most Insane Sleeper?Mike Spinelli5/11/12 3:00pm163EditPromoteGo to permalink You've seen sleepers before. Cars that look like something grandma might drive, but perform like something Grandma "Grumpy" Jenkins might drive. This 1972 Nova looks like a 40-something economy coupe, and a crap one at that. But look closer. In particular, under the hood.