Fender question and door handles

[hoodup]

This may be a stupid question but whats the diff between 67 and 68 front fenders? or is there no difference? I also purchased new door handles for my 68 that has a 67 driver side door, handles say they fir 67-72 but i can tell you 67 is stamped differently and well not accept the treads in the new handles. the old handle is tapped and threaded different. any one else experience this??