I have two 6 way fuse holders on my bulkhead with the wires running over the top of the ally panel. A large hole goes through the bulkhead to the wires to and from the switch gear and instrument panel. With the benefit of hind sight I wish I had put as much of the wiring as possible in the area behind the dash so that it was better hidden. If I was doing it again I would definitely do it that way. The Sierra fuse / relay box is way too big and simply not needed so I would not recommend keeping it. There are a couple of photos of my wiring here:
http://www.deepfolly.co.uk/8.html
Enoch