Ok, got everything taken apart and already bled the lower bleeder once, but the top bleeder is stuck (doesn't *appear* to be rusted, but put some penetrating crap on there in case. still no luck.)

I can't just take a breaker bar and loosen it because it sits on a vertical bracket and is attached to a hardline, so it is flexing a lot in my attempts to break it loose. What advice can you give on getting it open without damaging the hardline?

Quick answers appreciated, as it is already dark outside...

 

Flare nut-wrench