HJ Sandman 6cyl?

[Innuendo]

I would strongly suggest getting this checked by HHS.

I have a Brisbane sandman without the xx7 verified by HHS.

Also met paint 2 seats hoodlining all line up to a sandy.

Indeed, Brisbane plant was the only plant to add XX7 onto the plate for Sandman but is also the most documented plant for miss stamping (stamping mistakes).
Always worth checking out further if you have an inkling about the possibility of something being a Sandman.