Clay,
First I recommend a search on your subject. Second, if I remember right, the new DC alloy wheels will not fit rear drums without some work first. One member here wrote that the drums interfere with the new style wheels. This member ground the outer surface (don't remember where) to make room for the alloys. If you can try the wheels on before buying, do it. I do not approve or disapprove of the modifications. That is your truck, your problems, your life. Do what you want. Try the search and see if that answers your question better than what I have written.
Ronco