I run the Isky Red Zone bushed mechanical rollers. I attached a cut-away photo. I believe there is some info floating on the web that they actually don't directly oil the bushing though. So far, my valve lash is very stable and my valve train is the smoothest running it has ever been. I did use B3 racing spec'd custom T&D rocker arm set-up and Manton Stage 5 7/16's pushrods.

Another thing that i did was install a collar on the distributor shaft to limit the up and down movement of the intermediate shaft gear(it dramatically reduced wear on my previous bronze gears), which is a hardened steel unit from Hughes Engines.