I've been glued to this post & trying to digest all the research & info brought out by many. I gotta ad one fact that I know first hand. I bought a brand new 70 Cuda, Lemon Twist & black, Super Commando 383 4 speed, 3:23's, AC, rear window slats, magnum 500's. Paid $6k cash & drove it off the showroom of Sam Krug Chrysler Plymouth in Vegas. I remember vividly the 335 HP orange 383 w/ the Holley carb. I know for a fact it was rated over 10:1 compression & used the factory literature to impress my bro w/ his 69 Charger R/T. I buried the speedo (past 150) racing my friend's 63 fulie Vette. Only mod I had was headers. Ran like a raped ape...even with AC.