Both are a lot of work, but a traditional body drop is more straight-forward and should cost less. The frame work needed to do stock floor takes more material and experience. For a traditional probably around $3000 on up for the std cab, and a stock floor would probably cost a bit more. It varies by shop, and some quote a lot more. You might get some lowball offer from small shop, but wherever you get the work done you need to check out their work in person and also talk to people who had their work done there as well.