John,
I got the Rack & Pinion option and think the car is much nicer for it. It is much lighter on the wheel (feels like a lot less castor).
I went with the CB Wide 5's and Disk Brake package. I love the way the CB package looks, but I am not sure it is worth the extra money. Jim Ward went with the CB's and the Bivens and it looks, well prefect. If I were doing it over, I would go with the SoCal Wide 5 units and the stock disk brakes. Scott Sloan has the SoCal units and his car looks fantastic without hub caps. These cars don't weight much, so you probably won't have too much problem getting stopped with either package. Another negative of the CB units is they are 1" wider than the SoCal units, so you need to have your rims offset changed, unless you go with a custom wheel like Bivens.
I also went with the Koni Shocks, but I am not 100% sure I would spend the extra money on these units again. My car handles great, but the front suspension is a little stiff. Joel Schlotz, who has been doing these cars for almost a decade, drove my car and the first thing he noticed was the stiff dampeners up front. I think even George Brown had mis-givings about the Koni's. Now having said that, I have not touched the compression or rebound setting yet, so I may be a few clicks away from perfection. If I get my Fuel Injection install done before you have to make a final decision, I will dedicate some time and we can see for sure. If you can't wait that long, I would go with Henry's "stock" choice. Henry has forgotten more about these cars than anyone else is likely to learn, so anything he specs as a stock item will work pretty good.
Good luck on your new car. All of us are waiting and watching with great attention.