Jeep 4.0 in 69 Barracuda

Please if anyone does work in a machine shop, I would be glad to hear from you. Killer, would I be correct that you are a machinist (please feel free to PM me if you wish)? I am a engineer at Microsoft and though believe I'm capable of the mechanical aspect of this project, I am willing to admit my specialty is not Metallurgy. All I can do to make the best effort is make use of the types of materials originally used in the components. For no other reason than the belief that someone with more metal smarts than I made the decision that the chosen material was the best option for the intended use.