I'll stick with the old school junk. Regardless of what anyone says, the Gen 3's are more expensive to build and install. The headers, oil pans and engine mounts they require are not cheap. The rotating assemblies in side the junkyard pickup truck 5.7's are just that, junk. For a fun, 500-600hp street car, an old school RB build can be done for a fraction of the cost without roller-this or stroker-that.