Strut rod bushings
I recently did the strut rod bushings in a '71 Valiant VG (an Aussie car), and the one-piece design was such a PITA that I purchased a set of the two piece bushings (Moog parts). MUCH easier to install, and same end result.
Unless your car is a Concourse restoration (or your a masochist), there's really reason to use the one piece units, in my opinion.