273 Rocker Arm Oiling

340inabbody said
Socket fixture on a grinder or just put it on a Bridgeport?

I've used everything from a bench grinder and a file to a drill press with a broach. It's not hard to see when it's flat and most of them don't take that much at all. Luckily with the slant 6, the top of the adjuster hole is already flat.