MMMMM. Interesting, but not useful. I have a harmonic off a 3.5 that I intend to use in the balancing of the 3.9 I plan to rebuild. It has 3 V belt grooves on it - does that make it an AC type? Cant think of any other reason for a 3rd belt. Can I, or should I, remove it ....once I know which 2 to keep? Will add a pic tomorrow. 3 proud bolts at front - do they secure the front pulley?
The unit currently on the car has piece at the front that just has a curved front edge that doesnt form a belt groove. The above doesnt look any longer overall, so I dont think it will be a problem.