Years ago (many) I purchaced a push rod kit from Mopar Performance that you cut to lenght then finnished putting them together. They had a long push rod finnished on the bottom, a cup, a drill to open up the ID where the cup fit(after you cut to lenght) and a fixture to hold the push rod while you pressed the cup in. Thick walled CM I belive.
Does anyone offer a kit like that anymore?

Brian