As far as the mechanical layout is concerned I don't know if there's a difference. In appearance, yes. But I think they all fit the same. And if you have to make it fit anyway, I'd go with the one you like best and make it happen.
I saved the one that was on my '68 Barracuda and welded the sheet metal pocket into the quarter on my '72 Duster. Lower profile and I think it'll work out fine.
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