Yeah understand your point but it would be a surprise to me that anyone looking for a handling car would run manual steering. I have the borgeson power steering and a 13" wheel and it finally feels a little bit sporty. The issue you run into with wide tires and low or no positive caster is it wanders a lot. The caster makes it drive nice and straight which is the secret to most modern vehicles.
Yeah, you should be able to get a couple of degrees I would imagine.
