Any AD hood from '47 to early 55' will work.
The only difference is where the holes are for the side badges and the 47-53 front badge holes are recessed.
The front badge holes on the 54'-55.1' are flush for some unknown reason, but they are in the correct place for either style of front badge.
I have a 54' hood on my '49 3100. It fits well enough to have taken first place in all three of the biggest shows around here which are actually selected by qualified judges.
