Exhaust Manifold Bolts

[Bitter Beard]

I have an 87 Chevrolet 4x4 with a 350. Recently an exhaust leak has developed on the passenger side in the front.

I narrowed it down using a hose and listening when it was cold. My question is: how easy can it be to snap the bolts on the exhaust manifold? I’ve read horror stories doing searches here for my problem and really don’t want to rip the whole thing off to tap out a bolt. I don’t have a torque wrench so I can’t tell how much pressure I’m applying to the bolts…

Also, on the manifold, in the front, there is a bracket that looks to keep the alternator in place. These front two bolts sounds to be where my exhaust leak is happening. Is there any simple way to tighten up the front bolt without removing the bracket entirely?

I ran out of light yesterday and had to quit working so I didn’t get to examine it thoroughly.

Couple additional pics to see more area:
Pan Picture
Top Picture

Thanks in advance for any help.
BB