60-62 lower ball joints vs 63+ ball joints

[skidpan]

I'm in the middle of mocking up my front end before disassembly for final paint, and I've ran into a situation. I've boxed my stock 60 torsion lower arms for bags, and removed the bump stop brace. As any one who has pulled the early lowers knows, the ball joint has two bolts to the arm, and one to the bump stop. I'm going to be using other means for a bump stop.
It would be ashame to clutter up the work I've done to the arms, and build a brace got the lower ball joint. Is the taper of the later style the same as my early. And would it be feasible to just drill a couple holes to bolt in the later ball joint, it being more readily available, not to mention more affordable?
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