I have a 71 SLANT duster, the underhood wiring harness (original??) it has the two field wires, but looks like it was set up for the points dist ( it still has)..
question is when did they go to ECU ? and did the slant go to that at the same time as the V8 ??
From My own experiences, ScampMike has it right, I owned (2) '72 Swingers, the 318 was EI OE, the slanty was points, the '72 Duster I have is a slanty with A/C and has
points. As far as the squareback isolated field/electronic ground controlling regulator systems, they were implemented for the '70 model year, and has been My experience
so far..............
