What PARTS did Hurst and Chrysler put in the Super Stock Barracuda & Dart not in other factory cars

I believe the battery & its tray were one-off pieces. And I'm not sure, but I don't think the Danas were "stock" B-body items, either and no other A-body I know of had a Dana under it. Come to think of it, the converters & auto shifters weren't production either. And weren't the A-arms in later ones different too?