Bob,
I have not mounted mine yet but thanks to FamVan5 (Norm) I got to take a close look at his and here are some photos. His barely clears the porchlight (by a sixteenth or eight of an inch). I doubt all porchlights are in the exact same place. I will try mine this weekend.
keep in mind that in the photos you can see that Norm does not have the Bushwacker Flares, which I do. I can see how that forces one to mount the ladder further back.
Jeffrey or anyone else-if you have the bushwackers can you take a photo or two so we can see where/how yours is mounted?