Ok, the plot thickens.... the 7/8 18 thread size is ubiquitous on domestic trucks and vans, even my 79 f100 4x4 uses it. I went to my two main parts shops hear in Charlotte with 4 Moog part #'s in hand. All they had in stock was ES2234R for a 3/4 ton suburban. The threads on the stud where to large for the spindle... but not by much, so I bought one it was $18. Figured I could make it work. This is where it gets interesting.... I found a taper calculator online and entered the dimensions for the various ball joint studs, I wound up with a range from 5.9 degrees to 7.4 degrees. Hell the mustang 2 spindles worked out to 6.5 degrees. This led me to research class of fit for tapered holes, I couldn't find much online and my machinery's hand book really only had specifications for stuff like Morris tapper shanks and what not. Further searching online I discovered the reamer for the mustang 2, 7 degree spindles from speedway is actually 1.5" taper per foot. I think there must just be really loose tolerances on these things. As long as the big end of the taper contacts metal before the small end, or heaven forbid the bolt, it should work. I'll see if they have a 1.5" taper reamer at work tomorrow and perform an experiment on some scrap plate.
By the way also took the Wife to the lake, mowed the lawn, and fixed the neighbors garbage disposal, so I'm not obsessed with this at all.... right?