Just about spot on for HJ-HZ, except 2.78:1 is GU7 and 2.60:1 is G70. HQ only had the dif ratio stamped if an optional ratio was fitted, if the ratio was standard for the model, eg 6cyl Belmont panel van, model code 0170, standard diff was 3.55 so it'd be blank if 3.55 fitted.
HQ is as follows:
Banjo:
G90 3.90
G91 3.55
G93 3.08
G95 3.36
Salisbury:
GV1 3.08
GV2 3.36
GV3 2.78
GV4 3.55
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