Yeah, that sounds about right. If you can get that slotted plug out without damaging the thread, make up a simple puller out of a hunk of pipe large enough to go around the pin itself, a decent plate with a bolt the same thread as the grease nipple thread. Have a handful of thick washers handy and as you screw the bolt in, should draw the pin out, keep adding washers between the plate (with the bolt in it) and the pipe collar, will do the same job as the special puller. I’d be soaking it in WD40 or Penetrene for a while first, be also handy if you had some heat handy, should you need it. Now I think about it, some early Jeeps used a similar setup, used to get the bushes out the same way once the weight was taken off the spring eye. Installation should be a reversal of the procedure either using a fairly substantial “G” clamp or tapping in with a brass drift. Use plenty of grease on pin.
