Is there such a thing as a 5000 stall converter that is streetable ?

Modern technology most certainly DOES override 1970s and 1980s physics. Technology continues to evolve around physics. If you continue to argue a 5K RPM converter cannot be streetable, you just FLAT don't know what you're talking about. You need to find someone down there who has a modern converter and go for a ride. You'll be amazed, I promise.
Well it doesnt actually overide it … more like works around it .