The concept of building a performance car from a base model vehicle isn't a new one. The most basic trim level typically is the lightest. Today we expect even the cheapest new vehicles to have a complement of features. The base versions of older cars tend to be free of air conditioning, sound deadening and even a radio in some cases. All of that contributes to weight. Muscle cars are all fine and good, but those who want a fast big car would want something like a Chevy Biscayne two-door sedan with a four-speed and the biggest V8 they could order or build.
