try to find a late model 120y with girlock calipers, better than the early model ones

from the 120y you only really need to unbolt the strut and i think thats about all you need (with brakes still attatched obviously)
then get some new flexable brake lines made up
need to change your mastercylinder from drum drum to dics drum, or just take the 120y master
also need to change rear wheel cylinders to 120y ones

think thats about all

unbolt the three bolts on top and the 2 under the steering arm, then you need to change the 120y strut top for the 1200 one as the 120y one will raise the car

then bolt them into the ute