Consider hitting up Bryan at posi performance to do port work.
He is porting eaton superchargers, and getting nearly 100rwhp more out of them at similar boost levels..
Recently a guy ran a 9 second quarter mile pass with a stock 03 cobra engine, and a factory eaton M112 blower with a posi port.
I'd imagine he could do wonders to your blowers!
Pricing is usually in the $400 - $500 level...