I'm going to do the same thing.
Mine was a 1984 Slanty and a mate sold me his parts for the Flat Front conversion.
It should be fairly straight forward because they were already mounted on his Slanty.
We had to pull them off again.
I'm putting these Flat Front parts on (majority of my front end was buggered):
F.F panels, F.F bonnet, stone tray, the a/c strip thing, F.F grill and headlights and a bumper.
Cheers Cody.