I need to know what angle shims to add to the front of my cj5.

the 5 is running a 258/t 18/ dana 20 if that matters, I dont see how it would.

I have a rancho 2.5" suspenion lift and 1 3/8" shackle lift on the jeep. I dont want to go pay money to get the angle measured in an alighnment shop, so I am wondering if anyone has this same setup and has had their caster(or is it camber?) measured and found the correct angle for this approx lift?

thanks
tony