alternator upgrade for 390?

6

67gt

New Member

May 17, 2005

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Mar 8, 2006

#1

• Mar 8, 2006

• #1

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

 

6

67gt

New Member

May 17, 2005

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Mar 8, 2006

#2

• Mar 8, 2006

• #2

anyone

 

S

Steve69

Member

May 11, 2005

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Mar 9, 2006

#3

• Mar 9, 2006

• #3

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

 

6

67scodegt

New Member

Feb 18, 2006

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Mar 9, 2006

#4

• Mar 9, 2006

• #4

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.

 

6

67gt

New Member

May 17, 2005

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Mar 10, 2006

#5

• Mar 10, 2006

• #5

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

 

6

67scodegt

New Member

Feb 18, 2006

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Mar 10, 2006

#6

• Mar 10, 2006

• #6

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.

 

6

67gt

New Member

May 17, 2005

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Mar 10, 2006

#7

• Mar 10, 2006

• #7

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