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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

Best Replacement 3G alternator ?

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Old Jun 22, 2022 | 01:41 PM
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Best Replacement 3G alternator ?

What would be the best alternator to buy when upgrading truck from a 1G to a 3G?
want to keep the factory mount and belts.

Truck is a 1972 Ford F250 4x4 with 360 engine.

I have read the 95/95 mustang alternator would be a good fit??

let me know what you guys have used.
thanks!
 
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Old Jun 22, 2022 | 02:23 PM
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when I was doing research for this, I came across this list. I will note that its from someone else and I cant confirm accuracy, but I believe these have the 3g alternator that use the same bolt pattern.
hope this helps!

94-96 Mustang 3.8 V-6
94-95 Mustang 5.0
94-96 Thunderbird 3.8 V-6 (non SC)
95-96 Windstar 3.0 V-6 (most are 3.8's)
93-96 E/F series Trucks/Vans 4.9 L6*
96 Sable 3.0 V-6
94-96 Cougar 3.8 V-6
 
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Old Jun 22, 2022 | 03:48 PM
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Here is a good how-to-do-it for a 3G swap
https://www.motortrend.com/how-to/in...r-older-fords/
 
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Old Jun 23, 2022 | 08:30 AM
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I got mine from Oreillys for a 94 Mustang with a 5.0. This wasn't the cheapest bet, but has a lifetime warranty. I also purchased the painless wire harness for converting to 3G. This came with good instructions and took out guess work and other misc. purchases. Check out this thread too that I did on the swap. https://www.ford-trucks.com/forums/1...isconnect.html

You'll loosen the 3 bolts and 'clock' the alternator so the plug is easy to install and not against the block. Not a big deal, but take your time and be gentle.



With the 3G upgrade I added a ground from the engine block to the frame. No more flickering lights and it charges perfect. I did disconnect the amp gauge as it's not made for 12v power. The only down fall to the upgrade in my opinion.
 
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Old Jun 23, 2022 | 08:45 AM
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I Installed the Small Case 3g, 95amp alternator. Ordered for 1995 Ford E-350 7.5L V8.

And it works great. I was a little worried about clearance between the alternator case and the engine block which is why I went with the small case.
Original on my 1968 F250 was a 38 amp. I also run to large Spal electric fans- no problem. I removed the original pulley and installed it on the 3G case.
Jim



 
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Old Jun 23, 2022 | 09:18 AM
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Awesome thanks guys. All this info is exactly what I need. Great list and great post.
thanks for sharing.
 
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Old Jun 23, 2022 | 07:48 PM
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My 72 has a 94 ford taurus 130A alternator in it. It barely cleared the head.


 
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Old Jun 23, 2022 | 10:59 PM
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Good to know. I was looking at those as an option.
 
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I got mine out of the junkyard, off a Taurus, with the wiring, for less than $20.
 
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