In reply to Levy_danny:
Nice one, good luck! I don't know this particular race but have done a few hilly ultras. In terms of building endurance, one of the things I found the most effective was doing a long run (usually Saturday) then going out again on Sunday and just spending time running. So any pace, any distance, just plod for a couple of hours on tired legs. You're never going to do a training run more than about 30 miles so it helps bridge the gap to to your race distance.
The other thing is to get the nutrition right, you can get away with it on a marathon but not really on an ultra. Learn what works for you and keep feeding on the go.
If you've done the training and get the fuelling right then I don't think there's much difference from a marathon in terms of approach and tactics.