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Yeah, I kinda figured that trial and error was the way to go, I really hate spending $30 on something that I'll probably only use once.
Thanks for the input gang! 
If you don't want to buy the kit just pick up a 39 cent protractor at the stationary store and glue it to an old rotor with the center centered over the main shaft of the distributor. Tape a piece of coat hanger to the housing to use as a pointer. Then just twist the rotor against the advance springs to measure the advance and adjust as necessary.
You want to measure on the protractor 1/2 the number of crank degrees you want, remember the distributor turns at 1/2 the speed of the crank. So if you are looking for 20 degrees of advance in the distributor the protractor should read 10 degrees.
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