Fitting AU2 Brakes to a AU1 Ute

[Ronza]

gday all now iv started to have a playy with many things on my AU's but what i gotts ask all you out there is does anyone know weather i can just remove the old AU1 brake callipers and fit Au2 /3 ones without modifications and if not does anyone know what is required im assuming the brake booster/mastercylinder is all fine and abs is not an issue as its not fitted to the AU1 ute and does not hitch up on the callipers anyway...

The reason i ask this is one of my rear callipers has Shat itself and seized but i have a few sets of series2/3 brakes sitting here not doing anything!!!

Any Help would be great cheers!!!