how high rpms on 360

i agre with the above. depending on your carb intake and cam , you may be able to rev to 6000 but really not be making power that high. stock 2 piece valves dont last forever at that kind of rpm either. if you do it daily , plan for a failure. if you only do it once in a while it shuld hold up a while. if you want to run serious rpm you nead good balance, and good one piece valves. Ive never had a bottom end failure in a sb mopar that was oiling properly, but ive broken plenty of valves.