I'm not sure if koni do the sensible thing and supply 2wd rears with a 1/4" spacer to go either side of the bottom eye fitting as the 4wd are 1/" wider, but even if they are too wide by 1/2" can simply chop 1/4" off each end of the tube/eye fitting.
The front cossie will fit, but need to watch tyre diameter mine used to be so close you couldn't get your little finger between the pan and the tyre, even on 205/50X15 std cossie tyres/wheels.
tabetha