Race car Alt. Wiring? Steering box interchange issues.

ALT:

Assuming you are talking about a Mopar without an internal regulator (Delco, etc) blue comes from on/off switched ignition and powers the field. Green hooks to the F terminal on the regulator. The I terminal on the regulator then goes and "Ts" into the switched power. VR MUST be well grounded to "same as battery"