LOL, you may as well have made the thread; Tyson Vs LaMotta. Marciano/Lamotta, the outcome is the same.
With that said, mathematically an individual of Rocky's mental and physical make-up could potentially take the inevitable 3-4 round epic beating that Kid Dynamite would dish out and gradually frustrate him over the next 2-3 rounds and , then, dominate him over the last 5-6 rounds through sheer force of will. This scenario is especially likely with the older Tyson but possible in either case. Prime Tyson would be a MAJOR favorite though...:good