That's what I thought too, but a lot of people say the rear drums won't clear the inside of the new style wheels?? I think the fronts are plug and play, but the rears are a problem........wish I had one to try on mine!

1964 C-30 http://s1179.photobucket.com/albums/x383/autoart3/64%20one%20ton%20dually%20flatbed/