LA heads on Magnum block?

This topic always goes back and forth. The Comp Cams stainless steel Ultra Pro Rocker arm (I think that is the name) had this feature and the PRW and Speedmaster stainless rocker arms were “modeled” after them. These rocker arms take a ball/ball pushrod setup.
If one of these rockers is used with lifters and hollow pushrods that oil through, no other oiling modification is required in most cases.
See this old thread for pictures of the Speedmaster rocker arms and it will be more clear.
A Close Look at Speedmaster's Roller Rockers