1940s Chev Truck

[Ausmick]

Hi all,
Brought this in Tamworth few weeks back got it dropped off at a mates property there. I'll attach a few pictures, the engine number TR3767868 and a couple tags with Holden on them but they hard to read off the picture. I'm up in NT working but will head back Coonabarabran in April go pick it up. I looked in the AWM ARN Books but so far haven't found the engine number but gone very close!
AWM ARN Book Vol 14 page 62/63
ARN 76436 TR3767867
ARN 76459 TR3767871
ARN 76467 TR3767870
ARN 76479 TR3767869
Learnt the books in no particular order and number can be a singular entry in other volumes, maybe even ex RAAF or RAN so no record.
Anyone understand what the codes on the Holden tag in picture is? or anything else to add about the truck.