P/S pump pulley

[redsled87]

I'm trying to get my pulley off fo the pump and it doesn't seem to budge. Its supposed to be a press fit. It looked like there's some sort of allen head right at the front of the pulley but, its hollow. I do have the puller that I need too. The installer part of the tool goes right through the allen head into the threads on the shaft. I've used both an impact and a 1/2" ratchet without luck. I've also got the grove on the pulley no b?%$&ed up now too. ANy ideas??? Its on an 87 R10 by the way.