So a little " backstory" on the HS non bushed rocker arms. Back when Crane was sold, and the new owners were clearly not interested in making rocker arms again, I thought that there should be a replacement for them, as they were a great little rocker arm, and nothing else really fit the bill in that price range. So, I started working on a HS rocker arm, non bushed, to fill that gap. I worked with them, to use a BBC rocker arm, that was drilled out, as that would be the most cost effective. I have the prototypes still in my shop. The first version, ended up being too short for the valve tip alignment. ( this project probably went on for 4-6 months). So, I was working at changing that distance, and at the same time. getting HS to make their standard rocker arm axle to fit an Edelbrock head properly. I determined it had to be moved .070. That was a done deal and we started selling the " E" version of that rocker. At that time, everyone just " lived with" the length being wrong. I wanted to fix that. Back to the unbushed rocker arm. " Somehow" ( still dont know why), my unbushed rocker design, made it to Mancini .Next thing I know, they had ordered 100 sets or something like that, and I was effectively out of that market. I didnt have the coin to pony up for that kind of investment in one series of rocker. I will post a pic of the original prototypes next trip to the shop.