The guys at Porterbuilt will take great care of you, but you may want to work with one of our board vendors to purchase your dropmember kit. Basically, it can save you a few bucks because they can pass on some of the savings they gain through volume purchasing. I purchased my kit through member n2billet, but there are many great vendors here on this site, including the guy who posted above.
To add to Kyle's suggestion you may also want to think about after market inner fenders as the stock inners won't work . Best of luck with your build you sure are starting with a good looking truck!