[Captkaos]

Since you are basing this on a stock or dropped spindle, it would probably be easier to use the stock lengths of the upper and lower control arms. Of course that would mean you would have to verify the positioning of their mounting points and it would be limited by your set track width.

How much bumpsteer are you getting now? You would have to measure with the steering arms connected. Is it under or over (toe-in or toe-out)? You really want toe-out? From what I have read, .010 - .020" per inch of travel is a good amount.