67 Barracuda alternator with 2 FLD connections

^^ yes or no, depending on what your calling a terminal^^

2 field terminals can use either method but to use an EVR, you must use dual field without a strap (EVR provides the grounds). mechanical VR needs a strap on 2nd field term as it does not provide a ground...see below



2 terminal (lets call it 2 isolated field terminals) alt gets steady power into one field via electronic VR as the fields are isolated and the 2nd field (does not matter which one) get a variable ground from the EVR. This regulates the alternator output voltage. The single field alt get a variable power in (by pulse width breaker point and a resistive feed from mechanical VR). Dual field will work with a mechanical VR with one field strapped to ground as shown with big jumper screwed to case. IIRC the cost was not the issue, it was a safer design (no regulator points to weld shut and cause a runaway alternator) and then to more closely regulate the power for the new Electronic ignition for 73 model year as is included in any ECU ignition upgrade. The more common squareback alternator had serviceable diodes while the older roundbacks pressed in diodes were not. Just evolution of the alternator.