Remove the wheel/tire, pull off the drum and measure the shoe width plus the drum ID and count the mounting bolts on the backing plate. eTrailer.com is a good source for parts and your local NAPA dealer for grease seals. New grease and cotter pins plus a lot of shop towels. Those of us who have done it will tell you how easy it is, those who haven't will be calling Good Sam/Coach-Net. New brakes on a 2016?
2017 F350 Dually 6.7 Diesel
2014 Silhouette 299 RKDS
Nights Camped 2016 - 43
He who dies with the most tools, wins!