F doesn't mean 1976, it means 9/75 to 8/76. GVW will be 2200kg. It could go either way, I have plenty of V8 auto HJ Kingswood utes recorded, lots are Sandmans and lots aren't. Absinth yellow was a common colour in HJ utes.

The only chances you have to identify outside of guessing on remaining paint evidence are:
1. If you can figure out either way if it was column shift or console shift, column is Kingswood, console in Kingswood XX7.
2. Look for evidence of approx. 8mm diameter or so holes through the front of the guards, both ends of the doors and in the back of the quarters for screws to hold the side strips on, the only way for these to be deleted was with the XX7 special vehicle package. Tailgate ends should be the same, but like the doors and guards it is hard to prove if the unboltables are original.

Picking the body as original to the tags will be a bit easier with this one too, as it was a TH400 which I've rarely ever seen anyone replicate a factory installation properly.