I'm running tubeless radials on the stock 16" wheels without any problems. The truck is a 49 3100. I cleaned the wheels up, especially around the lip where the bead would seal but didn't apply any sealer around the rivets. I've got approx 7K miles on them and any air I've added was/is minimal, they hold air very well.
The tire brand is Crosswinds and the size is 215 85R-16. With trial and error I've settled on 35 psi which gives the best steering and still has enough sidewall flex to absorb the bumps.
