A 4.7 half ton will do what you describe. But a bigger engine will do it better and last longer. An engine will last a lot longer when you only use half it's power, then when you're pulling it's guts out all the time. The transmission is a big deal when towing as well, especially if it's and automatic and you tow with it a lot, keep it serviced regularly or your tranny will die prematurely. If you could I'd get the bigger engine, but I don't think you need the 2500 (3/4 ton) for just a 2 horse, or car flatbed, get an equalizer hitch if you are worried about the tongue weight, they help a lot when towing.