My take on the oiling system crossover tube for the small block

CMcAllister said
7200 and up. Never used a hydraulic in anything like that. Always solid rollers. Any mods I've ever done (or not) were for the purpose of keeping oil on the crank at high RPMs to avoid starving the bearings. That is the priority.

I agree, for me anything above 6500 gets a solid. I spin low deck big blocks 7500 with solid flat tappets, but mostly 6800.