Stuck bolt ruining my life

So I just swapped this engine in and on first start the belt for the alt burned up because the alternator seized. It would have been so easy to replace it when it was out of the car and now it's fucking me.

Pic related: The bottom bolt that holds the alternator to the bracket is stuck. The nut is loose but the bolt won't move.

I heated the bracket, didn't work.
Any solutions?
Just kms?

good sized breaker bar with socket, spray the living fuck out of it with whatever penetrating fluid you have. apply pressure back and forward

If you have space you might need to give it a love tap with a hammer/mallet or something

Don't have space, plus it's late night here.

What do you mean about the breaker bar? The nut is loose and not a problem... shit is just stuck.

wait I'm an idiot

It would appear its hammer time

is the bracket threaded where the bolt goes through? some are, some aren't. I would think yours is not being that you've got that nut there. will the bolt spin? just can't get it out?

No room for hammer

Other side is a big square.

>he didnt swap the alternator over from his original engine
>he didnt even spin it to see if it wasnt fucking seized
I bet you didn't replace the timing belt/water pump or other shit like that you fucking scrub

Large flathead screwdriver to pry the bolt out

Pretty much this. The motor looks filthy. Can you not simply unbolt the bracket from the block?