Dropping a 440-cubic-inch big block into a Barracuda meant giving up power steering and power brakes entirely, because there was simply nowhere left to put them. Plymouth did it anyway, and the result was one of the most single-minded muscle cars Detroit ever sold. Here is why the engine barely fit, how few were actually built, what the weight distribution did to the way it drives, and why a well-sorted 440 Cuda still stops a car show cold.