I think the only thing I would do is have some rack mounts brazed on. Like Andy says, a chromoly fork isn't going to produce big weight savings. And I would figure out how to live with the hub width. There are enough hubs in that width, I think. The only thing I can see to worry about is wheel availability, but if you are spending $$$ for a fork, you can have a wheel built. There are even dynohubs that width, so it's not horribly uncommon.