I towed my brothers v8 valiant on a car trailer behind my car. I sat on 90-95 the whole way and it was only about 100kms trip but still it climbed the hills easy and didnt get hot once. Damn the jeep dropped in the ass though.
My dad towed a massey ferguson on a car trailer behind his cherokee. That one kept the speed down to 60-70 but she did it. It lifted the ass of the cherokee off the ground when unloading it though.... Id never seen anything like it, so we had people sitting on the drawbar and in the back of the car to keep it down