Flat tappet to solid roller...

Beehives are for flat tappets and hydraulic roller cams; although there's a dual spring beehive in the works from Comp/PAC or somebody, haven't seen one in real life.

I can say that if you want to go bushing roller lifter, the Isky bushing lifters (EZ roll MAX) are very nice, although sizing seems on the small end. But you're talking $1200+. I would compare to Morel, which tends to be on the upper range of sizing. I think these are excessive to your stated goals. S/F....Ken M