Morris,
I have found that 10 degrees is excessive on this length wheelbase car unless you are using it for autocross type tracks or street use. I have many times utilized reverse Ackermann on ground effect type vehicles due to the very large slip angles generated.
Below is a photo of the JBL with Willow Springs steering setup that is optimized for 450 foot radius corners. It is a bit of a compromise but the high speed sections are a very large portion of that track.
For Blackhawk I would use a greater angle similar to what you suggest. For instance, this is done on the JBL by changing the steering arm and the rack spacers that you can see in the photos.
Also one can argue that a little bit of front toe in under braking on a rough track is a very good thing indeed. (Turn 5 at Road America comes to mind here. At least the last time I was there.
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Gary..... Nice looking piece you have designed there. I will be interested to see how you like it when you start testing.
Beautiful sheet metal work as well. Congrats...
Interesting brake calipers. I guess one can never have enough pistons but I do wonder the reason for 5? Are they trying for high beam stiffness or are the pistons of various sizes to give even pad clamping?