1971 LeMans

Im thinking about buying a 1971 LeMans with a 403 in it. What are the major differences between a LeMans and a GTO?

I have a 71 GTO - main differences are in the front clip. The GTO typically had a Endura nose. The Lemans typically had a chrome bumper in the front with a different grille. Cars are very close - but your VIN will show it as a Lemans and not a GTO.