Hey Cylinder heads guys- advice needed

A kit won't help in this situation, he doesn't have the cast-in stands to move the shaft off of with the kit.
He has individual block stands, like early max wedge, so he might need new, different stands with the shaft moved. I think b3re can help with that too.
I don't know what to do about the different valve heights.
The trouble with moving the stands is that these blocks and shafts are drilled off-center to accommodate the long valves. If new blocks are made with different offset then the bolt holes will no longer line up with the holes in the shafts. I’ve already been down that road. It would be VERY costly to try and move the shafts any direction other than up or down.