I used a torch to get one stripped stud out of my case.... I wouldnt recommend it tho unless you have used torches in the past and know what your doing... you could really mess the cases up.. As for the dowel pin........ Pry until you get it all out if shes wedged in there, just be gentle on the cases
Also for the stud if you arent going for the heat method (torches) You can also try welding a good size nut to it.... Then simply turn it out, BUT if the stud starts to twist or it seems like it could snap..... Stop immediatly, you definatly dont want it snapping flush with the case. If this happens, dont go any further until you get someone who knows how to use torches and heat the case to get the stud out.
And for the drain bolt.... Heli ciol..... Man just ship the cases to me lol