yea talk is useless without proof. and obviously if you spent all that money sleeving the block and on prototype ECU's and whatthefuckever else, then you would have had some decent valve springs and retainers and hopefully would not "drop a valve". I have ran the hell out of my cars, over revved a few times, and never "dropped a valve". I bent a valve once when I was trying to show off and did a 4th to 3rd at 120. The engine pulled about 12k rpm, and the valve bent, not "dropped" but bent.