I found bushings that may be a decent option. They can be ordered with a shallow grove at angle to help feed oil to the bushing. That combined with a hole drilled through the top of the rocker in the lightened area of the bridge which will get oil from spray bars and splash from pushrod oiling should help keep oil coming. I just need to call and see if i can get them in an alloy that has both high strength and good wear resistance to marginal, unpressurized luberication.