If possible, try to get forged pistons. I don't know if they're available. If so, you can turn up the wick with an intercooler and run pump gas safely to 12 or 13 psi. If not, you'll have to keep boost down to the 7 psi range. And with a turbo, your engine will have an appetite for more cfm as well. So a larger carb might be okay.
