yeah its no hard task for this engine to turn 8500-8800 even 9000 i didnt realize it would turn on so hard or rev so quickly when i put it together or eles i would have done my research and built it with this stuff in the beginning
I'd get a new tachometer also. Hydraulic lifters will usually float the valves at about 7500 rpm's. JMO Comp Cams is a good place to start for your solid cam, lifters and springs.