In my '69 Buick, I have to replace the steering rack now anyhow, so I was looking at converting to manual steering. Another thing I was thinking about was converting to an electric power steering, however I think that is mutually exclusive of the alternator removal (because the electric power steering can draw some really big amperage).
The other problem is that fuel injection depends on a certain voltage to function as the computer is anticipating. As we know, most cars run about 14 volts when the engine is running, but the best you'd hope for is about 12.5 when the alternator isn't present. At a lower voltage, the injectors don't open as quickly, which throws things off a bit (especially at very low pulsewidths). So many systems will try to compensate (which usually means over-compensating) by adding to the pulsewidth when the voltage drops.
Maybe we should invent a way to run the alternator by an electric motor.
-BC