Because they are High Performance. If you have never had one, you won't understand. You can't make sense of it by theoretical numbers. People never sold them. Barracudas would sit and not be for sale because it had the Commando drive train and people just loved those cars for the way they drove, sounded, and handled. If you put all the good stuff in any small block, they will all run great. It does not matter whether it is a 273, 318, 340, or 360. I've had them all and built them all. Had my pick of all, and the ones in my basement are 273s, 340s, 383s, and one 440 with A-Body mounting bosses. Build what you have, it really does not matter.
