Do you have more pics of the front? A lot going on there, some I can say for certain, others not sure. Specifically, the front with the lower control arms on.
I see a couiple of things.
* They use an extended/lengthened spindle
* The upper control arm has been modified to change the ball joint angle to allow the arm to sit at a steeper angle, better camber curve without having the ball joint run on the edge of it's misalignment angle. It looks like they are longer also, this would be needed because of the dramatic a arm angle increase, the effective horizontal length would give problems with the minimum camber setting being too much into the negative. Simple solution, make the arm longer.
* It LOOKS like they not only used an extended spindle with a revised inner ball joint hole (increased kingpin angle -> wider front tires without the scrub radius penalty) but they also moved the arms UP. Most likely to drop the car.
* The trailing arm bolt hole has been raised SIGNIFICANTLY, I'd guess at least 1. 5" (they are using the guldstrand toe adjust bolt too). They cleverly plated up the bottom part of the trailing arm pocket so when installed at first glance it looks stock-ish.
The idea behind this is, same as raising the diff. Effectivly you are lowering the car without upsetting the suspension. What raising the diff does for the halfshaft, this does for the trailing arm (affecting trailing arm angle and anti dive characteristics)
* The diff was raised, so was the pinion mount. it's a good 1/2" higher than stock.