Just a side note to this as I agree with Oz that the Start of HJ was the change over but
this was with the cars themselves as Holden was using the longtail on paperwork as far back 1971.
I have seen the long tail lion on paper work as early as the new HQ Kingswood advert that says copyright July 1971 so way before the cars themselves got the long tail lion.
I have just been talking to Norm Darwin on this subject as to when the lion changed in the Toranas.
I have March 1974 listed as when LH Toranas were introduced and October 1974 as when the HJ series were introduced so the date would have been part way into the LH series so if they received them sooner than the HJ's I am not sure.
My sons 26/7/74 completed Sydney built HQ has the short tailed lion on the steering wheel badge and I believe that it is still the factory fitted one.
If anyone can supply any information as to what lion the LH series Toranas used Norm would be greatly interested.
Cheers Paul.