[Flathead Fever]

I have Snap-On stud puller that works really well for pulling flathead studs. You buy the puller and then you buy the collet with the thread you need and clamp it down on the stud. Then gently let it hammer with an impact; ithey will usually come right out. It worked well on this block except I broke two of the studs. I tried welding a nut without a washer and the nut broke off so then I welded a big thick washer to the stud and then a nut to the washer (grind off the plating to get a better weld, let it cool off and they came right out. I used to do this to remove broken exhaust manifold bolts on engines at work, I never had broken bolt that I couldn't get out doing this and the weld will not stick to the cast iron.