im running a 3.4 on my SS m90 kit, no intercooler, my car is fine. pick up the powerlog from zzp as well as a 3 inch Downpipe, you can also get a nice ported rear manifold. dont bother wasting money on pacesetters. get a nice set of rockers to help it breathe and drop a pulley. with a new pcm and proper tune you should have no problem running a 3.4 with bolt ons