If you have a measure up, you will find that the later scuttle ( concealed hinges ) is longer across the tops of the wings, hence your early exposed hinge doors will foul the scuttle.
No problem you may think, 'I'll change the doors too'. This you cannot easily do, as the hinges on the later doors and mounts on the shell are totally different. You could probably fabricate a special hinge arrangement, but how much work do you want to do for the sake of a later bonnet ?
I have doors, wings, scuttle etc from the later model which I have looked at fitting to my 'C' plate classic, hence the above advise.