It still has more to do with what you are towing with than what is connecting the two vehicles. I tried to tow a loaded SCLB F150 with a ECLB F250 with a 7.5L. The tow bar angled up from the 250 to the 150. Scared the daylights out of me! I only made it about 25 miles and gave up. Came back the next day using my extended E350 with the 5.8. Tow bar angled down to the F150. I pulled that thing 250 miles at 70-75 barely realizing it was there. Physics plays into towing quite a bit.