Sorry to hear about the pushrod clearance. Just a thought.. would rocker shaft shims work for you in this instance? Seems I read somewhere that Hughes makes them.
Don't think so. The rocker supports are in line with the pushrods. The rocker shaft would need to move closer to the intake side of the head.
I've got my machinist lined up to mill out the bottom of the holes for me. It is great that he lives just down the street from me and has a Bridgeport milling machine.
Hope you and your family have a safe and happy Easter.
Jim