Peter,

I have seen the Shop manual photos and have the same quandary that you do - the 48-51 photo and the 54 photo seem to be the same.

Nonetheless, the part numbers that you show for hood lower latch (8.080 PLATE ASSEMBLY) are indeed different.

So, you are correct to say that both the radiator upper baffles (grill covers) are different, as are the hood latch mechanisms/plates.

Tim