CPP 2.5" drop spindle lower balljoint problem

[JVictor75]

Exactly what lower balljoint am I supposed to run with CPP spindle CP4S4L? I've now stripped 2 (count 'em TWO) castle nuts on the lower balljoints trying to get them to seat.

I'm no He-Man, and I'm not using anything air or electrical powered to try to get these things to seat properly, just plain old heaving on it with about a 18" Craftsman breaker bar.

Yes, I know I can call the techline. I tried calling, they're out for the weekend and today and tomorrow are the only times in the near future I'm going to be able to get this frame into a rolling chassis.

Any help would be appreciated.