Looking at the on3 kit. I have 331 stroker with forged internals, ported tfs heads, ported rpm intake, blower cam (any negative issues keeping it?) however running 68' block with girdle and canton 7qt. road race pan. This is pretty much a street driven car so I don't need the biggest turbo I could get as I will be keeping the a/c and leaving 130 amp alt on the passenger side. I wouldn't mind spending a few bucks to upgrade to ceramic ball bearing for reliability however I don't understand the options available for turbo sizes. I visualize running about 7 to 10 lbs of boost which I don't know hp wise where different sizes would take me hp wise, thinking 600rwhp. Are the larger turbos only effective when running more boost such as am I doing wrong to get a larger turbo for down the road (when going to dart block and more boost) or at the boost level better off having a smaller turbo? Also if one could also recommend injector size/brand to use. Let me also know what has worked for tuning as I was thinking about switching from pms to microsquirt.