CR calculation, deck height/effective dome volume?

Thanks guys, I truly appreciate your help with figuring this out. The irony is, of course, I'm normally thinking about ways to increase the CR in an engine. My '72 340, which has the low compression Speed Pro (TRW actually) Forged units, is getting either some EQ heads or a new set of hypers, or both. The cam suggestion is helpful also, since I'm only now starting to learn about how important all the different aspects of them are. All I used to focus on were the lift numbers. I'd blame it on the ignorance of youth, but I'm not all that young...