The width of your hub isn't an issue, just add the required spacers.
With the brakes, buy two FRONT brakes. You'll need to drill out the fork for the recessed nut, but that's no real problem. The rear bridge is a bit more scary but the front brake has a long enough bolt on it to allow you to use a nut on the rear.
seau grateu said earlier
Tektro makes nutted long reach calipers as well, so you can save yourself some potentially disastrous drilling there.
If that's as it reads, you won't need to drill anything.
Have fun. Don't rush the project. My Europa took over three years for her full conversion ... and she was being ridden all the time, I just did things as I felt I needed them and as I could afford them.