390 w/open chamber heads

TX - No need to apologize. A writer can only control 1/2 the conversation and hope the other half gets it as intended. In regard to the post in #43 - go reread it. I think you may have misunderstood me. I intended to say I totally disagree with not square decking.

Tre - As I said - you have the right idea but there's much more involved with a running engine as compared to a pipeline transporting a liquid or a gas. The physics of hydraulic theory works with a homogeneous liquid or gas. In a gasoline engine the mixture going through the intake port is heterogeneous unless there is direct cylinder injection where the intake tract is dry. Because of that, it is not as cut and dried. You can puzzle over it all you want. In the end, should you change the intake, you will have improvement.