You can easily measure caster. You measure CAMBER at two settings of tire turn in/ out, you subtract the two readings, and multiply by a constant depending on the amount (degrees) of wheel turn in / turn out. Hang on..................
Basically you are turning each wheel a total of 40 degrees. In other words, from straight ahead, turn the wheel either in or out 20* and take a camber reading. Now turn the wheel the opposite way, so if you first turned it in 20, now turn it back out straight and continue turning until it is turned out 20. Take a second caster reading. Subtract the two readings and multiply that number X 1.5 and that will be your caster.
Remember, you want the top of the spindle layed back as far as you can, pretty much. Start with the adjusters such that this is so, in other words, the front cam on the A arm pushing the arm outboard of the car, and the rear cam pulling the cam inboard towards the center of the car. Then jiggle the adjustment to get your camber in and see where you ended up
1...Set ride height
2....Set camber/ caster
3.....Set toe.
Be sure to joggle the suspension to settle it, and I would roll it back, roll it forward onto the plates once again, and recheck, and at least re-check after a test drive.