I don't have any pics.
The basic arrangement should be the same on any Z31 pulley, though.
Of the 3 rows, the rear two are one piece, and the power steering pulley is another (bolted on the front). The bolts go through the PS pulley, through the alt/AC pulley, into the harmonic balancer. The balancer holds the keyway, and the alt/AC pulley holds the timing marks. Since the double row pulley isn't keyed to the balancer in any way, if you take it apart, make sure to reassemble with the timing marks starting right over the top of the keyway (spaced clockwise away from it).
I've heard talk of two and three piece pulleys, but I've only ever seen the three piece unit. Car is an '84 NA, and the reference pulley I used came off of (I think) an '86 (two V-belt, one serp for the alternator).