1) Unbolt pedal from linkage
2) There's another both that holds the linkage to the brake pedal frame. Remove that bolt
3) remove spring attached to linkage

BTW the linkage comes out with the booster

4) Unbolt 4 nuts that hold booster to firewall
5) Unbolt master. I've been able to rig it where I haven't taken off the lines from the master just moving it out of the way.
5a) remove vacuum line
6) Remove booster
7) Remove linkage from booster. Note that there is a bushing in the rod in the back of the booster. Don't lose it because nobody makes it.
8) Reverse to install