So what you're saying is we should build a time machine and send Jack back to 1969 and pick up the two grand finals we lost?
I'll get the flux capacitor, you rustle up a faraday cage!
Fun fact. 1969 was the same year that Dr. Evil went back to and asked for 100 billion dollars - more money than existed in the whole world at the time.
I think if we sent a 195cm Cripps back and told them he was a midfielder, we'd get a similar reaction to Dr. Evil.