according to the guys who set mine recently youll want +0.5 on the left to whatever you set up as .. eg.. on the left lets say 3.5 on ther right youd want 3deg
the extra half degree on the left makes the carpull slightly to the right which counter the road camber down to the left
camber
camber wont really affect road pull but when you adjust the castor it will affect the camber rate on turn in, the more castor the greater the lean over of the wheel (camber) as you turn lock to lock, you just need to make sure your clearances are ok depending on what castor you want to run... I ended up having to cut my gaurds to get the settings i wanted.