I'm currently rebuilding a 1978 Honda z50 Engine, and i've gotten the cases all put together but when i started doing the studs i forgot to fully clean out the thread holes and so the studs on the flywheel side don't go in enough to put the dowel pins in. I tried to remove them again using the double nut method, and stripped the threads on the top of the stud, and so i tried a stud remover but it didn't grab tight enough since z50 studs are quite small. Anyone have any more ideas of what i can do? Thanks in advance.