Front arb is not interchangeable, but rear is, rear is 18mm on 4wd as opposed to 16mm on 2wd, escort cossie ones are fitted as well and are 22mm, but I used a SCORPIO(NOT grandad mk3) cosworth saloon rear one at 21mm and a lot cheaper normally.
Anyway straight swap over with bushes etc.
Brakes swap straight over with no brackets needed.
Yes defo worth polybushing whole car.
tabetha