Brake booster going out?

Dr Diff, no problems. i don't even redo the lines, just gently push the MC into position so they don't kink.
So Im 90 percent sure I ordered the wrong booster and want to just go to manual brakes. Which master cylinder should I use for going that route? Will I just need the pushrod and master?

Also I had started to tear down the booster before the new one arrived. How the hell do you get the pushrod off the pedal? Its just spinning and doesn't seem to be any way to get a hold of the back bolt. Thanks in advance.