your stock bottom end redline is about 5500 RPM, with an OCCASIONAL 6000 R's maybe. Don't run it any harder than that, it will let go any higher. WHy get a cam that makes power till 6500 R's when you don't want to push it higher than 6k? A comps 274 is as much as I'd run practically. If you want to take a step away from practical just for the sake of having a decent cam, a 280 magnum would work.