the only way your going to get hp is up the blower boost and i doubt where you can go above 8 lb psi if that with a 9.6 to 1 compression ratio. think about it. it really all depends how close the block deck heights are and how close the head ccs are to there blueprints from the factory to determine what your real compression ratio is. i do wish you the best of luck tho.
In NO TIME there will be heads (AFR,DART,BRODIX etc) for new HEMI and dished pistons,rods,stroker cranks,cams etc. I wanna see what a new Hemi will pull with 8.0:1 CR and 20psi..
With my DSM I can run 20 psi on 94 octane pump gas, stock longblock..TUNED.
Centrifugal blowers are cool..but I'd rather a turbo set up.