I found a rocker arm on my engine the other day that just wouldn't run true (straight). Upon removal of the rocker I noticed the end of the valve is damaged and needs repair. I don't really mind spending the afternoon removing & replacing the heads I just don't want to do it every 5 or 6 months. Now for the Question. Would it be OK to use self aligning rockers on my old 1974 882 Cyl. heads I know that they are not the best heads to use, but the mid size vales and the larger combustion chamber lead me to believe they would work well under low revving heavy loads. Now that I have spent a lot of money and time on these heads I am going to use them.