I apologize if this has been answered before, I searched and didn't find the answer.

Some stock(???) hemi rocker shafts use a light spring to push the rockers into position over the valve tip, others have a clamp to prevent the rocker from "walking" on the shaft.

Does either system have an advantage?

I am thinking about attempting a home built 572 and trying to sort out how to get a good rocker setup with stock valve covers. I was a chevy guy from 1986 - 2017 so I am trying to catch up a bit on mopar stuff.

Thanks
Craig