Training equipment, technology, dieting and supplements, etc. have all came a long way since the 70’s and early 80’s. I have no idea but would speculate that very few track and field records set during that time exist today. Some sure but not many at any level. Kids are stronger, faster, the tools available are just far superior to that era. With that said I kinda doubt teams from that era would be mopping anything. Just my opinion and acknowledge you may be correct and there will probably be people backing both sides of this. Not trying to start another pissing contest but just a different perspective.