Need help dismantling spring hanger

[Baketown Scotty]

1966 GMC Suburban 4WD

I'm having trouble removing the pin/ bolt from a frame bracket that connects the front leaf spring rear hanger to the frame. It looks to be threaded but can only get it to turn just a bit. I've used PB Blaster but have not tried heating it yet. Is it threaded or does it need to be pressed out? C catalog does not appear to show it being threaded. I would like to remove it before sandblasting the frame. Here are a couple of pictures.