jor

Still working on my new heater core project. I'm stalled trying to get the steering column out. I removed the wheel and the two column mounting nuts but I can't get the column coupler bolt out. Here's a photo of the bolt. It has a round head on the left (outside) and a 10mm nut on the right (inside). I took the nut off but that bolt will not budge. I can get it to turn slightly by putting vice grips on the round head but it seems like it is almost pressed into the aluminum column. Any tricks to getting this thing out? Thanks.
jor