not sure about upper a-arm I can measure if you need me to, with the new springs the ride is very rough when I go over a speed bump ( even at 3 mph ) the front end jumps over it, every little bump feels like your hitting big rocks at 60 mph. If I cant find another option on lifting with a better ride ( I cant take it offroad like this ) I am thinking of lowering it. I like the look of Viles black one that he made into a short bed