Good find! So the OTC 8149 fits in the knuckle recess well to pop the taper off the lower control arm? If so I am ordering one. $19.99 is a super price.

A few weeks ago, I went to replace the squeaky lower ball joint in my 83. I had another knuckle with a new Lemforder ball joint already installed to swap out. Got everything disconnected except for the taper on the lower ball joint. Nothing I tried worked, which included the 2 hammer trick (can't really get a good swing), banging on the stud/nut while supporting the knuckle from below. I didn't have a torch so couldn't try heat. If I only had the OTC 8149, I wouldn't have had to give up.

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked