I 2nd that motion! Stock valve train is good for 8K rpm and valves will start to float at about 8.3k.

Check the compression and if you deicded to mismantle the engine, have the head pressure tested for cracks.

David Zambrano tuner@slicktuning.com CSVT E1 #4808 You get what you pay for. All advice here is free. http://www.slicktuning.com -my homepage