Are you 100% SURE you have the arms on the correct sides? I know it's a stupid question, just trying to cover all the bases. And I mean 100% and not 99.9%.
Oh, I am quite capable of making mistakes. (and I will admit to that when they occur) With upper control arms like ours where the front is higher than the back, the ball joint sits level (or dang close to it) when the UCAs are in right.
You can see how the ball joint pad on the stock UCA is tilted to sit level. The QA 1 arms in my Charger are like this....
When they are in wrong, you can really tell.
One time some 20 or so years back, a guy in our Mopar club was building a Hemi Challenger. He was selling some parts so I went to his place to buy them. He had his Challenger on jackstands and I could see he had his UCAs in wrong. I politely let him know and he did not appreciate being told that.
Some people are SO touchy!