Emergency Brake Removal

[MStokes]

I'm trying to get the emergency brake taken out and wasn't sure if I was doing it correctly. There are two bolt going through the firewall that appear to be almost like wheel studs with splines on the shaft. I got both nuts off and the screw on the dash and when I tried tapping the firewall bolts out they didn't want to budge. How much of a BFH can I use on these without causing any damage and is this the correct method?

I'm attaching a photo of my setup in case there are different kinds out there.