before you swap, make sure the replacement pump you are putting in is the same as the one you are taking off, the 4wd stuff is different from the 2wd stuff, and the cossie stuff can be different again in regards to the placement of the pipework and the resivour

best to drain the brake fluid first from the calipers with gravity
at least you won't get it all over the engine bay, that stuff is a bit nasty

while this is happeneing, remove the drivers seat, it makes life much easier

then, as mentioned, unplug the clips, some are more difficult than others as they aren't clipped on as normal, undo the brake pipes from the bottom of the unit but rememebr to mark up which pipe goes where

then get in underneath the dash and remove the 4 bolts, andthe pin from the pedal, but make sure that the unit doesn't drop off into the engine bay
if you need to undo the pedal box remember there is another bolt at the top holding it in place