How good was Laszlo Papp?

I posted this a while back in the History section but had no response so.. I've read up a little about Laszlo Papp,how he won 3 olympic gold medals,had a great career in the amateur ranks then turned pro at 31.His country pulled the plug on his pro career just before he was goin to fight for the title. Im just wondering just how far he could have gone in the pro ranks had the hungarian government not stepped in? Could he have won the title,made several defences then retired undefeated,or would he have fell just short after spending many years in the amateur's and only turning pro at 31 with his best years possibly behind him. Any thoughts?