what is really stiff? what are the spring rates?
camber is dependent on your driving style, track conditions and the overall layout of the track.
I suppose a decent place to start is -2.5degrees up front and 1.0-1.5 in the back.
Depending on how low the car is, the amount of static gain should also be taken into account.
damn...now that's a race track!
I would just go with those settings I recommended to start. You might want to contact britishracer to see if he has some of the older Spoon catalogs on hand.
Within those pages, it lists the recommended height of the car in mm measuring from the bottom of the tire to the arch of the fender lip....but by the sounds of it you got it spot on already.
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Click on the Civic.