To answer your question sniper, the iron Mancini rockers does not mention anything other than regular iron heads. If you look on the bottom of the Harland Sharp listing of the Mancini website, it shows different rocker for the Edelbrock rpm heads. Trick flow says to use those same rockers I believe I did call Hughes and they said they were just getting started producing a rocker that would work on all of them. They are almost as much money as the Harland Sharps.
