OK, I had a go at swapping the brakes and I ran into a couple problems. The one that is worrying me is that the S14 rotors are too thick; they rub against the dust shield thingo. Will I be able to use the thinner Skyline rotors safely or do I need to considder modifying the dust shield?
The other problem was that the banjo bolts from the Skyline were too long for the new calipers but I'll just get some shorter ones.