suspension set up for the track what are you running?

Ok, can't sleep got an idea bouncing around in my head.

so I was wondering what everyone is running on the track?

Ladder bars? solid or floating?
Cal-Tracs? do they work on our trucks? can they find instant center
solid or Aluminium spring bushings?
4-link?
Tire size, pressure, Bias or radial.

etc.