go the supercharger route! i did on my oz hemi 277 cu in and have not looked back.i used the eaton M90(same blower as you are looking at)and i overdrive it to the max(blower is made to spin to 14000 rpm)and i make around 10lb of boost.when you floor it ,boy does it surge forward,the V8/WRX boys don't know what to think!