Re: Valvetrain adjustments
Mechanicla rollers are the best for top end performance. A hydraulic roller is heavy and will float at around 6,500 RPM. The solid roller is harder on valvetrain parts and require heavier springs that wear out faster. You also need a good oiling solid lifter that is designed for low RPM street use or you will end up with roller needles all over the place.
I run a hyd roller. I have an SBC 400 that I don't really need to spin past 6,500 to make the power. A high rev 302 or 327 will be more in the solid roller realm. What are you willing to sacrifice, maintain, check occasionally, etc? What will your real life power band be. All this must be taken into account before selecting the cam. Of course, gears, stall, intake, carburetion, exhaust, and intake versus exhaust flow of the heads become important factors.