I have a 2 post Atlas 9KOH and love it. As Mitch said it is tricky to get the posts just right around the brake rods and muffler to get the A in position, but it works.
I have 7" extensions and the top of my arms clears the bottom of the running board by 3/4".
Even though it is a 2 post, in the winter I use it to store cars on it. Basically turning a 2 car into a 3 car garage.
Mitch what brand lift is your 2 post? It looks rugged.
By the way, the underneath of you car is just to disgustingly pretty. I love it. The bottom of my car looks like the Exxon Valdese.