Thanks everyone! As it turned out getting those pins out was indeed a challenge. I ended up carefully marking the centers of the broken pins( or as close as I could) and methodically drilling progressively larger holes and finally tapping with a 5/16 tap. After a good soaking with PB Blaster and inserting a grade 8 bolt with large washer I used a pulley extractor threaded onto a slide hammer and banged them out. I watched quite a few youtube videos on extracting broken studs but was afraid of applying heat with the torch as I was unsure about heating up the crank end flange and warping something. A quick trip to the machine shop produced a short piece of 3/8 stainless rod for free which I cut, beveled and hammered in. Lets just say the new pins suffered slight distortion re-seating but a slight filing and even pulling with the flywheel bolts seated the flywheel and now I`m back on track to getting that new, used engine in the truck.
