Appreciate all those helpful tips. Initially cleaning seemed to be the
way to go to me, but after weighing everything, the best approach is
just to replace the tank - that way I know what I have.

Another couple of questions:

Are the tanks sold at JCWhitney ok? How about some of the other parts
they sell? I also definitely need floorpans - are JCW's pans ok?
Or are there other good part stores you guys use?

To get rid of whatever crud is in the system, could I just blow air
from the pump down intake to the tank (the old tank, that is)?
After that, I'll replace the flexible portion of the fuel line since it
can't be in great shape after 13 years. Is that the best way to do
that?

Thanks a lot -- really appreciate the input.
Remco