the guldstrand mod only changes the upper arm, moving it back about 1/2" to increase caster, and lowering it about 1/2" to improve geometry somehow. this guldstrand fellow apparently has been doing racing mods for longer than i've been alive, and you can order a template from him, or you can copy one off david's site. the holes for the control arm shaft bolts are moved back, and each is moved down a different amount to change the angle too.
i dont see how moving the lower arm forward would help, but i'm not an engineer. i dont know what the global west or other kits do to any aspects of the suspension. they look really cool, but not within my budget, so i never really did any investigating.
