Also something to consider is that running 10 psi on your engine is going to equate to around 250 hp and 220lb/ft of torque, and the fact that you're running 10.5:1 compression ratio does mate me concerned because you're probably at the limit of what the engine is prepared to take in terms of cylinder pressure and you could become "unstuck" (throwing a rod) Hopefully this won't happen and I don't wish this on you, but it's not the power and torque figures that kill engines, it's cylinder pressure coupled with high thermal loading. For example, A 306 gti6 engine is a brilliant base for tuning but if you drop in some 12.5:1 pistons and some cams it will throw the standard rods out of the side of the block (big mess.....) that stuff along with supporting mods will see no more than 270hp, 170-180 lbft torque (probably more like 250 ish), if you decomp. the engine then you can use a turbo and I've seen gti6's run 400 hp and 300lb/ft from just a decompression plate and a turbo of course with no fancie forged internals. So just take it under advisement that if you want more than that then you will need to devise a way of running a lower compression ratio so you can use a higher boost from the supercharger.