Far North Racing has an HTML suspension calculator at:

Autocross to Win (DGs Autocross Secrets) - Dynamics Calculator

It requires knowing the weight of both sprung and unsprung masses of the car and wheel/suspension components. There is plenty of info between TireRack, RockAuto, Crossfire Forum, etc... to get data without actually weighing everything. I plugged in my info and the car is very close to perfectly balanced. I believe with the lighter battery up front you will be even closer, but I've got an NA.

Also, there is a full suspension mapping software tool call WinGeo at:

Mitchell Products Page

I don't know anything about it, but the farnorth racing author is an SOLO champ that swears by it. Good luck Les. Your persuit for perfection is leading us all down the same path.
Mike