I hope he isn't doing 100 mph corners in any car, lol, let alone a 71 valiant with old technology suspension and brakes. But he is a teenager so anything potentially stupid to do, he's probably considering it. Reading what dr diff has said of the mo400 ther are designed to hold side pressure and load no different than the OEM stuff of their time. Definitely have to give it some thought and debate before we make a decision on it. The vast majority of the driving is under 45 mph with the corners being a turn in an intersection or pulling into a parking space.
