We can discuss any number of rocker shafts which is fine, but just remember my original post was referring to "factory". My first 273 was a 1965 Valiant back in 1975 and I have another 1965 273 now, a Signet convertible--no grooves and one oiling hole in my old stuff. It's interesting to see all that's out there. Galling looks to have been a problem after so many miles.
