Thats my primary concern. How many thousandths or fractions there of is required to cause the balljoints to start spinning in the knuckle. If i was installing a used set of OEM knuckles i wouldnt be concerned. At $600 each plus tax for these high steer knuckles i dont really want to play trial and error to find out.
Highly likely that i could press them out and put them in the new knuckles and never have an issue, but there is that possibility. That said, If personal experience has taught me anything over the years its that if something can go wrong it usually will in my case. I kinda give new meaning to the phrase, "luck of the Irish" when it comes to working on my truck.