Oil pressure issue

Alright update. Pulled passenger header, pulled the remote system off, spun a filter directly on and turned motor over still no pressure...... I'm really bummed. Guess my next step is dropping the pan but I'm not real sure what now? Yank the pump in thoughts of it being bad? It's a stock pan and pickup but I'm still stumped that I had pressure during pre oiling so WTF? Is there a way to get that pump drive shaft out aside from pulling the intake so I can throw my pre oil rod on it to spin it over without turning the motor? I just don't want to damage this sucker anymore than I already may have. I guess I can yank the rear main cap off and get the rod out that way. Has anyone had a faulty pump recently? I think its just a melling high volume pump.