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

yes the early one were small bolt.
autoxcuda said
Rotors and hubs drilled (originally when manufactured) for 4 1/2" pattern.

Brake setup was used in '66 trans am a-bodies. Tarozzi helped a little bit on that after hours project.
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This is correct where they car from.