Fiat 128 alternator

[Dalbello]

I have a 1978 Fiat two door US rally version. I am trying to find an alternator that will fit this year. It seems that the 78 model has a different type (maybe). It was a three wire clip with an internal clip that mounts on the bushing. My car never had an alternator so I have nothing to go by. I have bought one and it has two wires in the back with does not work with the clip from the car. The pic attached I think is the one I need but I cannot find one. The car has an external regulator.
Does anyone know if this is the correct alternator for a 78 Fiat sedan?

 

[Rod Midkiff]

If you are just going for something that works you might ponder the idea of going to a GM one wire Alt (most hot rod's use them) if the pully is spinning the alt makes power. the only wire goes to the battery, simple.

 

[128kid]

I have successfully installed an earlier alternator in my '78 Rally by using the early style external regulator and some easy rewiring.

I'll see if I have the original alternator at my shop to photograph for you.

 

[128kid]

That alternator looks correct. Here is what (I think) I pulled out of my '78:

And for reference, here is what a mid-year 128 setup looks like. This would have the big external regulator (not shown):

 

[Dalbello]

That is one I need but I can't seem to find one. I have bought two already with the seller indicating its for a 78 but when I get them they are for an early version. I need the three wire connector bushing as shown in the picture.

 

[128kid]

Vick's has one listed.
http://www.vickauto.com/newstore/index.php?main_page=product_info&cPath=5_7_57&products_id=2084

I was looking at the ones I have and the later brush pack (with the 3 wire plug) will fit in the earlier alternator. I haven't had a chance to check wiring diagrams to see if there are any reasons it wouldn't work though...