Not trying to squash it at all, but I don't think I've seen a chart or the breakdown with SAI's at 13ish degrees.You can't squash geometry.
The only practical way to retain scrub radius when lifting a Jeep and jamming big tires under it is to run a axle that is wide enough to allow you to place the tires in the right location for the SAI.
It's kinda a big deal if you don't want to learn how to drive a Jeep with mucked up geometry.
I can supply all the stats if I can find the formula for it..
And caster should affect the SAI also, right?