Check out
Muhammad Ali vs Cus D'Amato
Just shows the huge variety of so-called "boxing stance"
https://www.facebook.com/video.php?v=799237553481471
From 1.50 here:
https://www.youtube.com/watch?v=C187XVrOuFo
Cus looks like he's pulling out a few Choy Lee Fut moves there! Ends with the reverse leopard fist!
Seems to be taken from this, although the bit of interest above isn't in the longer tape:
https://www.youtube.com/watch?v=YrWlHDYDkjg