the majority of the super duty trucks have the 9007 bulbs , where the bulbs just pull out of the back and you replace the bulb. but the work truck XL models have the old sealed beam style bulbs like the pre 87 ford trucks. the problem is the sealed beam bulbs are not as bright. the body shape is the same so i was wanting to add aome aftermarket lenses and upgrade to the newer style maybe from a scrapyard.