Now that is cool ^^. I do know that my factory roller cam LA 318 has stamped steel rockers....So It may be possible with a big block. IF you do this, please keep us informed.
We could do it effectively, but, I have no intention of ever running a hydraulic roller in anything but a mild rebuild of the magnum small block. Eventually I will explain why. It has nothing to do with the rockers, but the retro-fit hydraulic roller concept.