Z head and O head on 1973 340

I just purchased the Larry Sheppard book! Thanks for the tip. I have one of his other titles too. I have How To Build Big Inch Mopar Engines but it wasn't much help in this endeavor.

On the cam, I searched that one out because I am a good clip away from the local drag strip and do not really want to trailer a car with my '76 D100 318. I am planning on a 3.73 gear for this reason.

Thank you @Rumblefish for taking the time. You're responses are valuable to me. For now, I will start reading a lot more. You bring up excellent points on milling heads and how it snowballs into milling intakes. It sounds like a quicker, simpler, and probably around the same cost involved is the W-2 head. That stuff comes up for sale often and I may be able to find a deal. I am not rushing into this so I'm looking at taking a lot of time to collect parts. Just need to pick a direction and start collecting. Hopefully, the How To book will give me a better idea of which direction to take.