Wrong ball joints?

[AWEGS72]

I bought new lowering spindles for my 72 from GMCPAUL'S and was installing them last night. I put in new upper and lower ball joints while I was doing the job. I had the spindle in place,and was torquing down the upper ball joint but can't get it tight enough to see the hole for the cotter pin to go through. I can't get it tightened down enough it seems.The I looked at the other new one I have for the other side and its identical. I put the rest of it together and went to the other side,same thing on the other side too.

Anybody run into this problem? I called the parts place and they verified that they gave me the correct ones. Any thoughts,ideas would be appreciated.

Thanks,
Andy