Towing with "C" Notches

[rmvlt1100]

Dose any one know if you can tow a trailer if your truck has "C" Notches? If you can, what would be the best one to use? I won't be towing anything everyday just if I need to trailer a car or possibly a camping trailer every once in a while. I have tried to do a search but could never find the right thread to get a good answer. I'm am at a point in my build that it's time for final body work and an waiting to get the truck to the body shop and I wanted to airbag the truck a thought this would be a good time to get it done. I allready have drop spindles on the front and I am going to be changing an air bag system instead of springs. So any help would be great. Thanks in advance.