Hey....here is my advice... if the stud is on the pushrods side, you will
need to change the stud. Why, a lot more pressure this side due to the
pushrods tube, anyway, as you are doing a nice overall job.... you should at
least try.

now, i had that problem a month ago, but yes, the engine was out, and i am
equiped do do so....here are a few suggestions:

First, here is what i had to do (mine was broken half way): removed sleeve
and pistons..., mig-weld a metal part to use as a lever...pafff, out in seconds.

But, you're engine is still in the van...and you have some of the stud still
left  pass the sleeve... now get a propane torch, file the stud each side at
the top part to get 2 flat side, just to get more grab with a vise grip...
wiggle your way in with the torch, heat the stud at the base / engine core,
for 5 minutes..or so....grab that stud with 2 vise-grip if you can...it will
come out!!!!!

Good luck...Ben