Hello All, I would greatly appreciate if a knowledgeable 440 engine Guru could fully explain/share ALL of the differences between the 71 440 vs the 72, when Chrysler de-tuned the 440 to comply with emissions standards, and EVERYTHING it would take in order to achieve the 71 power rating, and more, starting with most cost-effective gains. Or, I could ask to point me in the right direction - BUT - isn’t that why I’m HERE?!? Thanks!