"Baby Salisbury" is same pinion yoke as Banjo diffs... there is a 6 cylinder & 8 yoke. These went in all early Commodores with 6 cylinder & 253 (with larger yoke as used in V8 Toranas), the 308 (5 litre) VB-VK Coms got the Salisbury diff similar to HQ-HZ. Also WB utes & vans with 6 cylinder got the baby Salisbury diff with the larger yoke.

cheers
Max