Very true my friend. I have seen them on Holdens, but more on Fords - they were a factory option in '72. Often referred to as 'Globe' wheels they were seen on Ford GT's doing laps around a little mountain track we have, 'back-in-the-day'. There's a set here for sale that I've been contemplating Here. So yes - if you want speed, buy The Rovering Members' mags!!Can also be collected from NE London if required.
I think very similar wheels were fitted to the muscle Holden's weren't they, Rob of the old skool?