Any tricks to removing a stuck/stubborn/rusted-in place bleeder?

ProjectBazza said
No kidding? Almost 60 years old, and I've never heard of this!

I'm going up there soon to put the gas tank back in the car, and I'll give this a whirl.

Thanks!

I was told to wack it really good with a hammer off to the side for the shock value to help loosen it up. Heat comes after if that’s a failure.