Just my opinion, but i had a Hydraulic roller with nitrous, and i would never have another one. Go with a solid roller even a mild one. If you have good heads, you will need less camshaft. I am building a 468 with a solid roller, and it is a fairly nice roller with soft ramps, easy on valvetrain. My hydroller was all done by 6500 it was floating the valves, it is very hard to spring a hyd roller to run up high.