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Don't know for sure on a 57
A 57 has an "R" terminal like everything else up through 74 (last year of points and ballast resistors/wires). 75 up starters don't have the R terminal - this is the same as the "2 wire" aftermarket starter mentioned. If you need a ballast resistor bypass, you need to wire in a relay that's engergized by the "S" terminal.
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