My experience with tow bars is that if the front end doesn't weigh enough they don't turn properly. If they are heavy enough, ususally just having a motor in it will do, they will follow pretty well.
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more... It's true. I really don't do anything but browse the Internet looking for trouble...