Honestly, I would just go to
www.ford.com. Go to the Trucks & Vans selection at the top. From there you can pick which vehicle you are interested in, in this case the SuperDuty, and click on it. You can then Build & Price from there. You can build the truck the way you want it... start with a package, like Lariat, and then you can step through and make it the way you want it. I just did something similar playing around building a couple F-150's.....
One suggestion, if you find yourself adding a bunch of stuff to the base package you chose, back up and step up one... Like, if you chose XLT, and you find yourself "checking" a lot of boxes, go back and choose a Lariat and you might find a bunch of what you checked is now included, and a bit less......