alternator upgrade for 390?

[67gt]

I want to upgrade the alternator in my car I have heard a lot about the 3G. My main question is if I go to the junk yard what car/year should I pull one out of that will fit in? Is the wiring the same as my stock alternator? Also do I just take the pulley off of the old alternator and put it on the new?

Thank you

 

[67gt]

anyone

 

[Steve69]

I just did the swap on my 69 Mustang 302. I used a Ford Taurus 3G from
a 3.8L 1993. Do a Search for 3G there was a wiring diagram and more
detailed info in this forum. It was pretty easy except I had to lengthen
the lower Adjuster Bracket. The alternator cost $35.00.

Steve69

 

[67scodegt]

I haven't got mine mounted yet but the old oem pulley did not line up. I had a March and it lined up perfectly. You will need to run 4ga wire if it is 130 amp. PA performance has a wiring kit.

 

[67gt]

67scodegt: what car/year did you get it from, or was it new? was it the large or small case?

 

[67scodegt]

I bought it from an individual. It is the large case. I think there is a good article on a bronco site somewhere on the web that tells what to look for.

 

[67gt]

this http://bcbroncos.com/3ginstall.pdf and http://home.earthlink.net/~ehicking/mechanics/3Ginstall.jpg are installs that i found

I got one today from a 3.8L taurus for $35