vortech supercharger pullies???

I would swap out the lower (crank pulley) to raise the boost if it doesn't already have the 7" pulley. Swapping the blower pulley to a smaller diameter just spins the blower harder and will add to the rpm.

There is a chart on Vortechs site so you can figure out how hard the blower is working based on the compressor maps and rpm range of your combo.