How to take out bell housing?

[restorationboy14]

I'm replacing my Saginaw 3 speed tranny. The input shaft is stuck to the clutch plate so I have to take the bellhousing off. I was planning to do this anyway but I want to knowbwhat I'm doing before I start unscrewing bolts. I also have another question. I was taking out my water pump and the lower drivers side bolt head busted off. I've already somewhat drilled it out. How do I re tap it? Thanks for the help!
Posted via Mobile Device