Aussie chev truck

[Wayne Henderson]

I saw a chev truck with the remains of camo paint that I need to identify. The cab has holden body stamps on it, and one plate reads; chev cab. mk1. full door cab.
The grill is a farmers mod, has a 216 motor, 3 pressed lines across the roof,
2 across the top of the doors, a complete dropside wood tray and headlight mounted off the bonnet front, the side windows are very round.
Any ideas on a year or model.