It is easy to tell what spindle you need by looking for two things. First, look for that six-bolt pattern at the knuckle. Then, look at the id of the inner bearing. The early stuff comes in at about 1.780-inch but the later stuff that is more prevalent has an id of about 21⁄4 inches. Ford never went to the larger inner bearing so any Ford hub from 1976 until the end of the TTB front Dana 44 in the ’90s should work. With the five-lug stuff all bolted up our axle came in just a bit wider than stock at 611⁄4 inches.