[aussie 48 chevy]

ok so the Australian and American trucks look the same, the front sheet metal is the same and the cab body is the same up to the bottom of the windows, and even though they look the same :

none of the glass is interchangeable

the door frames are different

our cabs have a flap on both sides of the front pillar not a flap on one and lovers on the other

none of the door hardware including hinges are interchangeable

Aussie cabs don't have a vent in the cowl panel and have a recessed area for the wiper arms to fit

and im sure there is more that i am forgetting .