it all depends on how much boost you run and if you're going to build up the bottom end first. another important factor is to upgrade the fuel side. considering you want to run on stock internals, dont run more than 7 or 8 psi but you're still gambling on whether you blow it or not. upgrading the fuel stuff is a must and i suggest building up the bottom end to handle the boost if you want to make sure you dont blow your engine.