[Rick_L]

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.

 

[Rick_L]

Shadetree, my reply was generic not directed at you, rather to the OP and general readership.