Sorry about not getting back sooner on this but here's the measurements taken.
This is the measurement from the 90 degree machined surface of the spindle directly behind the splash shield with the splash shield removed. Measurements were taken from only 3 spindles from the machined flat to the closest point of the taperd ball joint hole.
First spindle measured 3 3/4
Second spindle measured 3 11/16
Third spindle measured 3 7/8
You guys & gals need to look for spindles that have the least distance from the machined flat to spindle hole