I have just bought a "Sandman Ute" on e-bay, the numbers seem to be matching, but I'm no expert.
The details are as follows

Vin Tag: 8M80RGL384220X

ADR Tag: HOLDEN HX UTILITY

06/77 AHX 34575A

GVW 1860kg SEATING CAP 2


Body Tag: MODEL; HX8W M 80

BODY No; 237375-A

TRIM; 1898-18V

PAINT; 567-15944

ENG; L32 TRANS; M20 RRAXLE; G7.

My interpretation of these tags are: 1977 Deauville Blue Sandman Ute, with Slate/Black interior. 253 V8, 4spd, 3.36:1 Diff which the seller informs me is an LSD

Like I said I'm not an expert so have I got a Sandman or added a fourth Belmont to my collection?

The car is very rusty and will need full restoration, the original engine is long gone but a 253 came with the car although I haven't checked it's casting date as yet .

My questions are, do the tags match? is it a genuine Sandman? and if everything is correct, how many Deauville Blue HX Sandman Utes were built?