or a wheel weight that came loose...that clicking happened to me, and my brake shop buddy found the loose weight in the cover!

 

Sorry I havent posting, its been 2 weeks now and the clicking still has not come back. All I did was remove the left front wheel, inspect everything closely give a good pull on the shock and spring and mounted the wheel back on.
Oh thanks Dave for the info on the simulators. Im not sure if I want to go that route yet. Im keeping my eyes peeled for a resaonably priced set of 19.5's to mount on.

 

You'll have a heck of a time getting 19.5's on the front of a D350. 235/85-16's are about as tall as will fit.