I would never try tuning the chassis based on the pictures.The first thing I would do is paint the wheelie bar wheels and see if one is contacting the dragstrip longer than the other,this will tell you which side is loading harder.Then try adjusting the bar height,if that don't work,try adjusting the shocks,next would be preload.If all else fails look for flexing or twisting or something wrong in the suspension componants and attachments as well as correct measurements and alignment.