My car makes that noise too. from the left fron even. The ticking sound that is. I don't have any idea what it is. I replaced all the suspension last year so nothing is just worn out. I inspected everything real good and didn't see anything askew. I agree, that it is an annoying sound. But I am pretty sure it isn't anything to worry about. Be sure to post up though if you figure out how to get rid of it.
Former owner of 94 Bird with DOHC 4.6L swapped from a mark VIII
2011 CTS-V Wagon
1968 Torino was an original 289, C4, fully documented numbers matching car. Now: DOHC 4.6L/T-56 swapped, Cobra intake, IMRC delete, BBK long tubes and H pipe. Dynotech Aluminum Driveshaft, 9" rear with TrueTrac and 4.11's.