I know. But, think about it: If I had that much trouble getting this end of it unscrewed, what's next? I'll need to replace the fuel pump. What's going to be on the other side of that? Another seized fuel line. That will happen all the way back to the tank and I'll have to replace the tank too, if I want all my repairs to be 100% proper bolt-on using OEM-like parts. If I'm going to replace everything from the carburetor inlet to (and including) the gas tank, might as well do that TBI conversion while I'm at it!
That's why it makes sense to repair it in place. The rest of the system works fine as long as I don't try to disconnect it. I'll leave that investment for another time, after I determine that the car is viable.
This sig may return, some day.