Charcoal canister bracket for 74 Dart

I have 3 from 1972 Dart Swinger. It took me 5 tries till I found a perfect one for me! The important thing to look at is the canister clamp. One has broken long bolt, another missing.
In CT

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The mounting tabs on the 72 look to be the same as my 74. Is the clamp the only difference?