I just realized I didn't update this thread on how I got around this issue,
First I had the crank grinder outfit I use submersion weld the step in the nose of the cam, the small amount of porosity is no issue. They then ground it back to size.
I also had them cut off the adjuster drive and power steering drive. IIRC they only charged me $80 in total.
Now great, but I still need a woodruff key slot. I got a cutter from china, but figured that's not going to work as the cam material is hard as hell, dang....what to do?
So I experimented with a few dremel grinding stones, found one that would cut the hardened cam material. I then dressed a couple of stones to the size I wanted with a diamond dresser.
Then with my good old lathe and slide from a Taig lathe I made a jig to hold my air die grinder. I chucked the cam in the lath and made a simple block to index the cam on the cams corresponding index blocks.
Then I painted the cam ends with some Dykem blue, marked the keyway and had at it.
cut off adjuster drive.
