I'm saying the combination of a 5cc valve relief piston, 64cc chamber, 4.030 bore, 3.75" stroke, 0.039" thick gasket w/4.166 bore(Felpro pn 1010), and a "zero" decked block would equal over 11:1 CR.
If you don't deck the block at all the CR is around 10.5:1. The gasket is one of the thicker ones normaly used. Of coarse any thinner and the CR goes up.
You didn't say what type of gasket you were using. Edelbrock doesn't normally provide gaskets when buying heads alone. They may when you buy a top end kit.
Reguardless you stated in your 1st post that you wanted 9.5-10:1 CR and welcomed any opinions. I'm just saying your combination is going to have more than that.
Have you heard of quench/squish. That article I mentioned may shed some light on what could make a difference according to allot of folks.
Have you tried the CR calculator I mentioned? Just trying to help.