Interesting! It looks like you're lucky to have the head of the jack so tall (several inches above the propane) and recessed back from the ball. I found a pic of an Alliance Delta and the bastion jack on it is low and is only a few inches back from the ball. So my tailgate hits it. Also a pic of an Imagine and the jack head is low and only a little back from the ball.
With the Bastion head on my Delta it looks like I could benefit a lot from a 90 degree rotation, but I am going to wait until my 3500 arrives before seeing how the tailgate lines up. Maybe I'll be lucky