[Charlton]

I have limited experience and knowledgd about rocker arms, but here is what I found. My 428 came with Dove rocker arms and 5/16 dia pushrods. Dove rockers have a shaft with alum. rockers and no roller bearings. The whole assembly seemed lightweight. ie. small locking nuts and small adj screw. I mentioned 5/16 dia push rods because the balls on the rockers were too big and cracked the pushrod cups on several rods.
I am now using Erson rockers. They have roller bearings and heavy duty adjustment assemblies. I also installed 3/8 pushrods.

My heads were installed with studs and nuts instead of standard head bolts. I had to remove some material from the rocker arm mounts so they would fit because the nuts are taller. Hope this info helps. Steve