Towing question

[6863m]

I am in the process of completing a 62 C 10 restoration and when I get done I would like to do a C-20 72 through 87. I would intend just to use the truck for towing a trailer and car carrier and not as a daily driver so gas milage really does not come into it.

My question is whether it makes a difference whether it is a short bed or a long bed. I don't plan on putting a camper in it so the short bed works for that and I like the looks much better. Also there might be more choices in a long bed for a 3/4 ton.

I hope my question is clear.