so i was looking through some threads and saw the idea of an ls430 caliper upgrade. my question is... has anyone done this? if so what needed to be done?

 

I've never seen it done, but I'd imagine it would work. The LS430 has some huge brakes.

 

LS430 brakes are not directly bolt on, brackets will need to be made. It's really not worth the effort over the LS4 set-up unless you want the "wow" factor. The "wow" factor being that the LS430 calipers are monoblock and more appealing, visually a cleaner look.