I actually don’t know if there are any “CARB-legal” cams. At least there are very few for the LS engines. There may be some for the Gen-I and Gen-II small-blocks. It’s a matter of “don’t ask, don’t tell.” As long as they don’t have too much overlap and aren’t too “lumpy” a cam shouldn’t affect emissions too much, but a radical cam can really screw up your emissions. I’d stick with a cam profile that was offered in a factory engine to be on the safe side.