This is my set up, I used to tow it with a 1/2 ton Nissan Titan and was legal it was a nightmare and I could not go over 55 mph. It was my old trailer that was junk but when I bought the Dually it was night and day,trailer never swayed and I lost my brakes on the trailer and did not even know. Its even better with my new trailer.
Is it overkill for a 29 Formula....probably but you don't even know its there. And I do some far runs so I'm towing a lot.