...I recently got new 19.5" Accuride rims from wheels now (same part # mentioned in Tech Tips)
In the rear they hit the drum before they'll seat properly.
Sorry you have this fitment problem. I went back and looked at the tech tip hoping that we haven't lead you astray.
Tech tip
https://www.stovebolt.com/techtips/wheels/I believe Accuride part number 29015 is what you are looking for, but do confirm that they will work before buying.
You may or may not have found this later info on 19.5" wheels for our 1 ton trucks, but it speaks to your situation.
https://www.stovebolt.com/ubbthread...ve-improve-drive-repeat.html#Post1142967(sorry the picture links there don't work, try this about half way down)
https://goo.gl/photos/H26qPfBHb7eS15698