I ended up with a new big block camshaft still in the original box, marked RKE Camshafts.
Numbers on the label are 91055 and 111801. No cam spec sheet in the box.
It came from a long time drag racer but he couldn't remember any specifics either, other than saying he wouldn't have saved it unless it was some form of a high performance cam. My memory is such anymore that I sure can't criticize him for that.
Most searching I've done comes up blank. What little I have found makes me think they were an aftermarket parts manufacturer of some sort. They did do a trademark registration at some point but it doesn't appear that was maintained.
Did find one mention in an AMC forum, but that was a dead end too.
Anyone here know anything about them by chance? Thanks in advance.