Quote Originally Posted by stroked95gt
Due to the amount of material we need to remove from the cylinders, we recommend an aftermarket block such as DART or WORLD. Rev limit would be determined by your valve train setup (rev kit, etc.), however we do not recommend going higher than 6,500 without a rev kit.
If you can keep the rpm's at 6,500 a hyd. roller cam would work fine.
I you want to twist it tighter than 6,500 than you should look at mech. roller cam's.