I have an opportunity to buy a 11.5:1 "rebuilt" block for a good deal want to run my jrsc setup on it? I know jrsc's love compression; but is that just too much on 93octane? I only want to keep it at ~6psi and have a crome pro tuner

also, would the crower 3s have too much overlap when running a supercharger?

 

11.5 compression could be pushing it but if you stay with stock pulley on the jrsc you'll be fine.
I would recomend water/meth injection for it just to be on the safe side.
if your getting it tuned I would say there wont be problems, but you can never gaurentee anything lol.
as for the crower 3's if you do the forced induction 3's it will be fine as long as its all setup properly by your tuner, but if your doing the N.A 3's your gunna have some problems.