4x4 calipers and 2WD discs (single pots) - bolt straight on, all you need is maybe a 1mm washer, but you will see when you offer them up

2WD calipers and discs (4 pots) - some machining needs to be taken off either the hub or calipers (not sure on how much) and a set of longer brake lines made up for them (Mike R sells these) also depending on the size of wheel you are using you may need to use a 5mm spacer to clear the caliper. Also the holes for the caliper bolts on the hub need to be tapped.

all from experience