318 complete combo suggestions...
the cam should pick your rpm range
get that nailed down
then build the motor to match
not the other way around ending up with too much compression and too big a cam and starting off on tha
and starting off on the wrong path.fixt it, I think,lol.
Just too add; it's always better to start with lots of pressure, lots of gasket, and a small cam; cuz a bigger cam with it's later-closing intake valve, will trap less pressure, avoiding detonation. But if you didn't have detonation with the small cam, you can always take gasket out, to maintain pressure. There is only a small window of effectiveness to this plan; maybe 2 or so sizes, Depending on original parameters; before the bottom-end goes soft.
Unless you start with aluminum heads and very high pressure.
Each size (7*) drops the pressure about 6 psi, so from 190psi estimated max for alloys, to 165psi (which you can do with iron), is 25 psi or ~4 sizes . Combine that with a gasket change from .050Q max to .030Q minimum, or about 4cc, you might get another 1/2 size in there. I'm too lazy today to do the math, cuz Rumble's in a good mood, and I don't want to spoil it with another long post,lol..