Just a tip
Was wanting to do a poor man "decking" of EJ25d case halves on my granite inspection block. Dowel pins were in the way.
Found a thread on NASIOC on using a 10x1.25 tap to get the smaller case half seam pins out.
Just wanted it in here for the record a 7/16" SAE coarse tap worked for me on these fatter pins- just cut threads in to them and at some point the pins break loose and turn with the tap- either gently tap on a vice grip attached to the tap to lift them up and out.. or I suppose if they were really stuck you could press them upward with a bit of threaded rod or a bolt.
Just a tip for the search records