Regarding all the areas of theory and technical specs and mathematical calculations that the factories had used back in the day to determine things like advertised compression, valve sizes, casting numbers and the like all I can say is I wish I hadnt spent the time and money on all the Direct Connection , Mopar Performance and other factory literature earlier in my life and just waited for the armchair quarterbacks to come along and correct all my errors! Think I may just be better off to concentrate on watching and chuckling to myself from the sidelines! Mikey 62 Crown Coupe