It most likely is an early HJ XX7 van. I assume it is a T-bar? If it is the original body for the tags and it is a T-bar then it will be a Sandman. It'll be a special order too, most likely LSD as well. Leroy is pretty close, if it was this build configuration on a Kingswood ute well then a black with chamois trim L31 M41 2.78 LSD example hmmmm. Whilst Tuxedo black isn't rare, it was not officially available until the HX colour range was introduced around 3/76. However I do have HJ's between 10/75 and 12/75 in 2214. I think the 10/75 on cars align with a trim upgrade around the same time. This car is 8/75 hence why I think it is something special. Being TH400 as well as these boxes were very expensive, probably a huge portion of the price of the base vehicle to upgrade.