Isn't that formula in the Ford Catalog just a Static Compression Formula? It doesn't include anything for intake closing ABDC.
Based on what's involved in calculating Dynamic Compression Ratios, I'd tend to stick to a pre-configured calculator. Try out KB-Silvolite's DCR Calculator at: DCR Calculator
I've been through a couple years of college level Calculus and Physics, and I, for one, will not trust myself to do the math right with a formula that involves as much stuff as in calculating DCR.
Static compression can be fun to calculate as an excercise in learning, but DCR isn't something real enjoyable to do by hand.
just my $.02