This is for the Ford 4G Family of alternators. These have one distinct identifying feature. They have a black metal plate on the back of them shown in the picture below.
There are different mounting plates for this particular alternator family. The main thing is to identify that this is a 4G, by seeing the black metal back plate on the back of the alternator. Our kits come with a Rotor with a slip ring already put on for you, a rear bearing, a front bearing, and a regulator. There are two types of kits this could be the regular 4G or the 4GWB which only has a different regulator on it.