273 rocker arm adjustment

Going back to the old discussion, I thought the plan WAS to add the banana grooves.....?? The contact of the pushrods on the guides may be slight but it ought to be none. As things move around at RPM, and the pushrods bow & flex a bit, who knows what will really happen.

If you are getting this galling all across all holes, then is seems like a supply issue. Do you have head studs by any chance? There are several spots in the flow path to the shafts where there are restrictions.

What oil is being used?