You could do that but you might over spin the supercharger. Your Bypass valve has to be far enough from MAF at least 20".
From the numbers I have crunched, the blower should be spinning no more than 40k rpm to make 10psi. With the blower being rated at almost 60k rpm, I doubt there will be an issue with blower failure.
As for the pulley, I know Morris, a Lextreme member with a GS400, used to run a Vortech and pushed it to the point of having belt slippage issues. I would PM him to ask him what pulley size he was running when he was slipping.