I'm by no means an expert on suspension--but isn't the idea to bring it back to stock caster (3-4 degrees IIRC) after the sprung weight is lifted? Again no expert here, but I'm having a tough time seeing how taller tires affect caster, when all they do is raise the axles. Or is that not what...
Let us know how that goes. Website touts drop boxes for 3" and above (and caster correction bushings for <3"), but I've been wondering how they'd be with 2".