That's because it was only available from release until around 8/75, and only on bench seats.

This HJ is another with the dodgy L stamp on the VIN.

Jennie, if you are near it again, could you possibly get some really good engine bay phots from many angles? We are re-doing the HJ judging sheets for Monaro, and reference photos are good to have. Especially for early HJ minus canister.