1956 F100 what can it pull?

I thank you very much for all the time you have put in helping me understand what I need to look into in able to tow a trailer with my truck. I will not be adding a turbo charger after consideration from all the commenters. The trailer I'm getting is considered a light weight trailer by the manufacturer. We will probably not go with the heaviest weight for the half ton series but look at something a little lighter that Outdoors RV carries for my half ton truck. The best information/suggestion I have received is the Gear Vendors. I am really happy I was able to find this out through this forum. I will definitely post pictures when the project is complete sometime in April. Thanks to all for the help with my original question.