Take another look at what I said.. I don't feel that you can put on rockers or the VS cam w/o upgrading springs. Too many people have broken springs following what ZZP said about it being perfectly fine. So, in my world you are upgrading springs and retainers anyway. As long as you do that, put on a new stock chain (which you likely would anyway with VS cam install) and put in the better cam.
On the exhaust. If you fabricate, hell..make your own Plog etc. and you should be reasonably without KR on that setup. Tune it and you'll have a pile of power and no KR.
