The other option that a few have used is to thread the larger unthreaded section of the crank before the original threads started. Hope this makes sense, but it may be your only alternative at this point.
That's what i was suggesting in my above post (but not sure I made it clear). A 3/4" 16 pitch bolt fits just about perfect. The ID of the snout there is just barely larger than what you'd ideally use (off the top of my head, I believe it's .70" and .685" is what is ideal) but it'll work. You can bore it out a tick and go 1 size bigger if you want as well.
There's also just about as much length there, as there is behind it in the threaded area so you've got a decent length of thread engagement area.
That's what i was suggesting in my above post (but not sure I made it clear). A 3/4" 16 pitch bolt fits just about perfect. The ID of the snout there is just barely larger than what you'd ideally use (off the top of my head, I believe it's .70" and .685" is what is ideal) but it'll work. You can bore it out a tick and go 1 size bigger if you want as well.
There's also just about as much length there, as there is behind it in the threaded area so you've got a decent length of thread engagement area.
Exhibit A
Bingo, didn't fully understand your post but that is what I meant as well. I don't think he has any option at this point other than this unless he wants to have a machine shop try and salvage the original threads.
