After a few PMs and emails, I was persuaded to post this update.
I have since put several thousand miles on the E350 and have not experienced a hint of death wobble. Some people were asking about Bilstein Shock part numbers for use as dual stabilizers.
Bilstein part #: BE5-6253-H5
Find example here:
http://www.powerstroke.org/forum/suspen ... -help.html
I still feel the best setup is dual shocks, not steering shocks, as real shocks are gas charged and have no "dead spot".