remember, mild steel is better on the street because moly cant withstand a lot of vibration and it can crack so after some big potholes or bumps you can have problems, where as mild steel is softer and can absorb shock alot better than moly.
I don't buy that one. All Off Road Race Cars and most Dune Buggy's frames are made out of 100% Chromolly. They see more bumps etc than any street car could ever imagine without cracking or seeing any fatigue.