[boarder_punk]

I'm not a dodge guy so I'm not sure how heavily that engine is built from the factory, but generally speaking an engine with stock internals will handle around 7psi of boost before encountering adverse affects.

Another power boosting route to think about is porting/polishing/port matching; and while you're in there, you could have a valve job done and put in titanium keepers and retainers and stainless valves with a cutdown shank, and maybe even shave .010" off of the head. Doing all of this could potentially gain you 30 or so HP, and it would increase the effects of a forced induction system without actually increasing boost. And believe it or not a good port and polish job can even increase the life of your engine and increase your fuel economy (until everthing gets all carboned up again of course).