the bearing on the cam is what everything lock down on. The casting on that head might be different, even though it has a two bolt valve cover. I don't know if the casting on the B head with 4 bolt holes will work/ be the correct casting.
I called scrappy and we hopefully solved the mystery. That indeed is the wrong head. I guess at one time there was another 2 bolt head other than the one scrappy sells but it's quite hard to come by, nearly impossible. So I ordered the "normal" gy6-b head and valve cover and we'll see if that works.