Last couple internal threads are also stripped. Know they make self-tapping drain bolts, but i'm afraid that would make the cracking worse. Figure the long term fix would be to have it welded and re-drilled. Aside from that, any other ideas?

Last couple internal threads are also stripped. Know they make self-tapping drain bolts, but i'm afraid that would make the cracking worse. Figure the long term fix would be to have it welded and re-drilled. Aside from that, any other ideas?

I had to use JB Weld putty when I stripped mine.

So did you permanently seal the drain bolt into the block? Thinking of doing the same as there are other ways of draining the oil (just much more messy).