Good luck but I tried everything I could think of (brute force and heat) and could not get the king pin out. I finally pully the entire axle and with it off grabbed a sledge hammer for one last attempt to drivee it out. No luck. I took the entire axle and new king pins to a local machine shop to have them pressed out and the new ones installed. The machine shop had better luck than me but commented on how stuck they were.
