[Mgs] Help - ether bulb

[jello at cableone.net]

I am trying to remove a 1967 MGB engine.  It is fully free, and hanging
precariously.  I can't seem to remove the temperature sender's ether bulb,
though.  The flats are pretty shot, and regardless of the fact that I'm
using a 5/8" flare wrench (not an open end), I just seem to turn corners.
It's not good.  Anyone have suggestions of how to remove this nut/fitting
without destroying it??

Phil