3.08 was always the standard diff with 253 and M20 in almost all HQ and HJ, there is no economy axles listed (except where 3.55 is standard eg 253 M20 HJ LS). 3.55 was standard in HX and HZ for the same engine/box. HQ had 3.36 as standard if 253 and M21 was ordered, but GMH obviously realised this as a mistake as HJ-HZ got 3.55 with 253 and M21. All of this is reflected in the vehicle ID I have recorded. Rarely do vehicles have diff ratios other than what is standard. I don't think you could get 253 and M21 on commercials though, only on passenger vehicles.
3.36 was always standard with 308 and M21 in HQ-HZ.

There was also the M22 which was the standard box on HQ 6cyl commercials and optional on all other HQ 6cyl. Also fitted to many HJ-WB tonners. Ratios are:
3.74:1
2.68:1
1.68:1
1:1
3.74:1