How to know if I have a 2G or 3G alternator?

[jwaked]

I know sounds very stupid but I bought a 91 LX 5.0 Supercharged that I am turning into a weekend drag car. I have never been very good with the electrical part. It does not seem to have any charging problems but I keep reading how good the 3G is and its a must have. How do I know if the previous owner already did this or if I have the stock 2G?

I am looking at the small case 3G, are they any good? Seems easier to install.

Thanks
Jay

 

[87GT Drop Top]

2G has an external fan.

3G has an internal fan.

 

[jwaked]

I will check tonight. Thanks 87GT.

 

[HISSIN50]

As suggested, if the alt has a fan blade on the pulley, it's probably your stock 2G.

 

[jwaked]

Well it looks like I have a 3G. What I don´t see is the fuse.

 

[87GT Drop Top]

Yes 3G. The fuse might be somewhere else in the cable. Can you see the whole run of the cable?

 

[HISSIN50]

The fuse is probably near the battery.