292 4bbl Carb

[Classic1965]

Ok so I guess I started the debate of the week or something. I don't plan to drive this truck in the snow or winter or in the cold, it is going to be a daily driver in the warm part of the year. I'm more concerned about fuel economy then horsepower and I plan to tow a 20' boat with the truck. Like I said it is a 292 with a 3 speed. I just wanted to know what is the best setup for fuel economy that can still pull a boat without issue. This truck will be driven long distances in the summer as everything up here in my area of Canada is spread apart. So I guess the marine carb idea is a bust, just wondered if it was worth my time because I had a few different carbs from different small block engines. So what do I need for the best fuel economy without losing towing capabilities?