Billet Spindles with Bolt On Hub Assemblies

I'm just starting to get into the intricacies of A Body suspension geometry, so I have been doing a lot of research on what the ideal geometry should be for handling performance. Is there a billet spindle available that corrects any geometry issues such as roll center, bump steering, camber curves, etc.? I'm going to show my greenness here, but are there any significant geometry issues that could be solved with a blank slate spindle design? As far as I know, the only type of aftermarket spindle available is a 2in drop spindle, which I hear can raise the roll center.

I was talking to Bob Reed and he suggested that I cut 1" off the top of my spindle and add 1" to the bottom to improve the geometry and lower the roll center. Because I own a machine shop, I was thinking I might just design and machine some spindles from billet, but I didn't want to deal with the integrated shaft and having to whittle all that material away from a block to get down to the rest of the spindle. That got me thinking about the Corvette style hubs that bolt onto the spindle. They are the wrong wheel bolt pattern at 5x4.75, but there are other makes that have 5x4.5 (5x114.3) bolt on hubs as well.

Creating a new spindle design would also allow me to adapt whatever brakes I wanted or incorporate dust shields with air ducts, like the Corvette. With that in mind, does anyone have ideas for brake systems that you always wished could bolt onto our cars?

If there are improvements that could be made with a new spindle, would anyone actually be interested in a set?