Mopar Performance Roller Rockers

What is the reason everyone is wanting the bushings on a rocker arm that has an aluminum body?

Staying close to this price point, you could get DOVE rockers made in USA, aluminum body, but I don't think they have bushings. Mancini Racing is also selling their own brand name aluminum rocker arms, supposedly made by Harland Sharp but without any bushing or needle bearings. Both of these would be a lot like the old Crane gold and the Mopar blue that were made by Crane.

The blue Proform from post 13 is also modeled after the old Crane rockers, but the blue Proform used to come with a note saying it was not to be used over something like .480" or .500" lift at the valve. I forget the exact number, and i don't know if it was a strength or geometry reason for that note.