Tig, a rocker change might not increase power that much. A lot depends on the cam profile and duration. Do you know the . 050 duration and . 200 lobe lift duration of the cm3 cam? It is possible the tunnelram may not perform as good as a 3x intake. I am not sure, but heard Indy made changes to the 3x recently.
I So much depends on the chassis and driveline, anything not just right and it drops the estimated power output. So i don't think most calculaters are spot on.