For caster, measure off the flat portion on the C's.
What stabilizer are you running?
Also, the heim's that come with the RC track bars have been junk for the past ~1.5 years. I've opened several up with major play in them new, and any that I installed had play within the first 500 miles. They need to be replace before they are installed with a better unit.
Build Thread - WJ on 35s