tubular upper control arms???????

a good alignment shop would be able to do the whole job for you, but if they cant why not go get a spec now, do 1 turn on each, test again and compare the difference, you will be able to see the change and how much each turn will do.
I actually think more caster is built into them with out any turns to start with.
On a side note i didnt think you could get 6 deg positive caster on factory arms?