Scott Hughes 06 Silver State setup for "the roughest track ever" has 350 front and 300 rear shock oil. Having run that setup on a blown out track, I have to say it feels pretty good.
If you're losing rear bite coming out of rough corners, you could try less rear anti-squat, the lighter rear oil, more rear toe-in, thinner rear swaybar, lighter rear spring, moving the bottom of the shocks to the inside hole on the arm or lowering the rear inside ball stud. Got all that?
