My parts book lists the following
38300-18000 Diferential 37/9 [4.11 to 1] Sedan & Coupe.
38300-H1100 Diferential 37/9 [4,11 to 1] Option Pickup [ute] Y
38300-18100 Diferential 35/8 [4.375 to 1] Van & Pickup [ute]
38300-Ho700 Diferential 35/8 [4.375 to 1] Van Y
38300-15400 Diferential 37/8 [4.625 to 1] Option Pickup [ute]
38300-G0500 Diferential 37/8 [4.625 to 1] Pickup [ute] Y

The letter Y means yes, that this part number is interchangeable with the part number before it. It's the supercession number.
It looks like the passenger models came with the 4.11 to 1 ratio without any options.
The Ute & Van came with a 4.375 ratio as standard.
Additionally, the ute could be ordered with a 4.11 to 1 ratio or a 4.625 ratio, but i don't think that we will find too many utes with factory fitted optional ratios in Australia