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Your cam choice is closely related to your CR as this will affect the dynamic compression. This is very basic stuff, but even if you're limited to one choice on block, heads intake etc, your cam needs to work with the static CR or you are wasting your time
DV has written some good stuff about this and Keith Black has a easy-to-use dynamic compression calculator on their site; or the easiest thing to do is call your cam company with the particulars for your engine and they'll make a recommendation
Agree, the dual 4bbl is just for looks on a street motor or dual plane intake. Lots of extra headache to set up for less power and mileage.
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