Frozen lower left alternator bolt

Hello Every Participant. Thank you for your input that was directly related to the question. I appreciate the various scenarios and will consider each carefully. I am sorry that my question has caused division and hard feelings which is the very reason I nearly did not post, which was my first, as this has sadly been the outcome of other posts viewed. Thank you
Lets ask the question here.
What are you attempting to do?
Water pump? Timing chain and gears?
What's your mechanical skill level, in working around cars?
A back yard mechanic that's capable of getting things done, or have a bit of professional experience in the mechanics trade?
I hafta agree that maybe drilling out a busted bolt in a block, can be a problem, and time consuming, but reinstalling a timing cover has really got to be a no brainer, that i'm certain that your capable of carrying out.
Good luck to you.
Happy wrenching.

You know any of the history on this engine that your working on?
The front of the engine ever been taken apart before?

I see your Ontario, meaning up in Canada.
You working on something rusty, to give you more issues?