The little magnetic mudule on the stator is the pick ups for the TCI. If you are using the points from the 79 it can be removed.
If you have a stock combo reg/rec it has the Red, Black, Three Whites, A brown and a greeen wire.
On your 80 up stator the wires coming up from it are Three Whites, a Brown, A Green a Yellow And a Sky Blue. As far as the alternator goes you only need the three whites, the brown and green wires.
On your reg/rec the three whites go to the three white on the stator, the red to battery positive, the black to battery negative, the brown to power after the key switch, the green wire to the green wire to the stator.
The brown wire from the stator goes to power after the key switch. Often peolpe hook the brown wire from the stator to the brown wire from the reg/rec together and run a brown wire from that connection through a fuse and hook it to power after the key switch.
I like this diagram. If you look it shows the early seperate reg and rec hooked up. It also has a box with the later combo reg/rec. you just swap the box for the early set up.
Leo