The stance for skiing and snowboarding (even skateborading to some extent as well as wake borading and surfing) is tthe same!
If you look at a picture of a good snowboarder turning/carving and a skier at the same point of a turn their bodies and feet are in the same alignment and angles
The problem on a longboard is that you cannot lead change between feet, unless you a fucking crazy and plan on swictching your lead foot in the transition between turns.
If you are following what I am saying, what you want to do would work only for turning in one direction...or one huge turn. Once you transiton to the next turn your feet would be the opposite of what they should be...
ENOUGH SKI GEEK TALK