i got some adj LC arms for my jeep with a 4" lift. how do i know how much to adj the new(to me) arms? i wanna install them but i wanna make sure i know how to do it right the first time before i start wrenching

 

install the lowers, and uppers...

then adjust the lowers until the wheel base is were you want it... basically just center the front wheel in the axle...

then use an angle finder and measure the caster... adjust the uppers until the caster is within spec

 

at 4" you lca should be 16.33" center to center. With re drop brackets lca = 15.75" center to center. Uca will stay stock length.

 

Only got adj lca for now, uca are still gonna be stock. Thanks for the input guys

 

in that case just adjust the LCA until the caster reads the best it can get