MUCH EASIER way. Simply get a stout chisel on the lip of the ball joint. A few leisurely but persistent taps with a 2 or 4 lb sledge works the edge of the chisel in prying out the pressed-in ball point a mm or two, then repeat a bit more onto opposite side a bit wider and so on. I was able to get bo...

BETTER, EXACT part on Amazon: ACDelco 20997418 GM Original Equipment Power Brake Booster Pump Assembly, I paid $60, but now lists for $88. both made by Buhler mfg, BTW, but sold as AD-Delco, Hella etc

Two tricks 1. JB Weld a nail, screw, pencil, whatever, overnight, being very careful not to get any on the inside of the tube. 2. CAREFULLY, so you don't push it down further drill a hole into it and then thread a screw. I started with the smallest fine bit I had, then used a second larger one to av...