If I understand boost somewhere around 7-8 PSI will give roughly a 50% increase in power

Somehow, this idea keeps repeating.
No, adding 1/2 of atmospheric pressure doesn't increase power 50%. It also cannot calculate what other losses will occur:
1. power to drive the blower (yes, even a turbo has parasitic loss)
2. power lost through higher temperature

More information? Read my article here:
http://victorylibrary.com/mopar/blower.htm