crower stage 2, and crower springs/retainer kit. The factory claims power at 10k so I will believe them...

Will that 1k rpm between 8 and 9 actually make such a large difference that I will need to use a block guard, and forged rods/pistons? Also, will the stock rods handle it at all? I am more concerned about oil delivery to the head, even the bottom end. I don't want to scar my rod bearings or my camshaft...