It is so simple to set on a solid axle front that you can google it and do it faster than driving over to a shop to get it done. Camber is fixed by the knuckle C, setting the steering wheel straight.. you can figure out yourself because it's so easy and toe is set by placing tape on the front of the tires and measuring the distance. Roll the vehicle so the tape is in the rear and measure again. The difference is the toe. Spin the tie rod adjuster so the distance when the tape is in the front is 1/16 to 1/8" less than when it's in the rear. It's really that fast and simple. When you're done with toe you adjust the drag link to center your steering wheel. That's the bar coming off of your pitman arm on the steering box. Do all of this with the weight on the vehicle and not jacked up.
Castor is fixed by the spring perch but if you want to check it you can put an angle finder on the top ball joint flat spot or kingpin. Turn the van 180 and park in the same spot and measure again. Average the two and that's your castor. Angle finders are $4.49 at harbor freight. You do it both directions to compensate for unlevel ground. Left and right rarely match. a couple degrees off is OK.
All you need is the tape measure for toe but if you want to see castor use this: http://www.harborfreight.com/dial-gauge ... 34214.html