I know there's got to be some experience on this topic. I ran a 440 with a steel push rod in the mechanical fuel pump while running a Comp Street Roller Cam. I ran this combo for 2500 miles or so. There was no visible wear on the cam when dissassembled. I was told that since a roller cam is billet steel, I should be using a brass-tipped push rod. When I went to purchase the part, I noticed a number of bad reviews due to wear. Should I continue to use the original, stock push rod? Are there options on the brass-tipped rod? What reccomendations do you have? Thanks in advance for your help.