TorqStorm Supercharger build advice needed

Thanks everyone. So before actually yanking the engine I had him run a warm engine compression test. Now mind you we did a valve job and .030 shave on the head before. Bottom is untouched and power is not great and has oil consumption and wet oily plugs. Hence the full rebuild and supercharger thread. Anyway, the way she sits right now we have 165-175 psi of compression. That seems great! But the engine sucks for power all things considered. Now my son and I had assumed the rebuild would give him more power and then of course the charger, but now he thinks it’s just going to be whatever the charger adds. Is it possible that actual compression while running is way worse than the cranking compression indicates? I’m not setup to do a leak down test at the moment. Blow by seems non existent with pcv valve connected to the carb. If I close this off his open element breather in the back of the valve cover does have smoke while idling. I just don’t want him to be disappointed in what the supercharger is going to add. I know the bottom end needs work due to the oil. I assume the oil control rings are just trashed. (We did Berryman a while ago just to see)