Dang Mike, you need an EcoBoost then
I've fully loaded my trailer with car, extra tires, tools, chairs....all the necessary stuff for a track weekend with no issues. A couple of other things to consider - trailering to events or to track weekends or both? Do you want any other car besides your Cobra to fit in the trailer? And, as others have mentioned, what kind of tow vehicle? I really like my Serpent Express, another option for you to look at :-)