18. They built the very first Viper engine.
The Dodge Viper was developed in the late eighties, while Chrysler owned Lamborghini. Rather than simply dropping a truck motor into the car, Dodge had Lamborghini cast an aluminum version of it for the prototype. It wasn't the one used in production, but somewhere, locked away in Detroit, is a Lamborghini powered Viper.
CORRECTION: An earlier version of this story misstated the Miura as the car that debuted without an engine. It was the 350GTV.
Aaron Miller is the Rides editor for Supercompressor. He likes long walks on the beach, so long as the beach is next to a race track. Cars with just two pedals still confuse him sometimes, but you can follow him on Twitter while he tries to figure it out.