The 8Ns I have worked on have too much wear in the steering spindels, tie rods, and steering gear box to even tow at 25 mph. Even at 15 mph, they can start flopping around from side to side and do damage to the gear box. I had one I was towing last year with another 8N that flopped the steering enough to destroy the upper shaft bearing in the steering gear box. At that time, it was going less than 5 mph. Some days if I don't have bad luck, I just don't get no luck at all!
Put out the word among the adult scouters to see if anyone can loan you a car hauling trailer. It is by far the safest way to transport an 8N.
Paul in MN
(former Asst. Scout Master who used to haul an IH 300U about 185 mi with 5' brush hog to Many Point Scout Camp to clear the area our troop would be camping in.)