I'd go with a Ford 3-G and a voltmeter.

3G is the way to go, but I would install it as a 3 wire.  You lose fine voltage output control when you bypass the feedback loop, which is what they do to convert a 3 wire to a 1 wire.

i have found this : 
http://www.tuffstuffperformance.com/i-24486302-alternator-140-amp-hybrid-oem-wire-v-groove-pulley-factory-cast-plus-7078nj.html

Please let me know if is right . i can ask for  oem 3 wire and add the external regulator right ?

Alessandro wrote:

TKOPerformance wrote:

3G is the way to go, but I would install it as a 3 wire.  You lose fine voltage output control when you bypass the feedback loop, which is what they do to convert a 3 wire to a 1 wire.

Question : the 3G is bigger and i got to change brackets ? 

There are different mounting for Ford 3G alternators. You need one with mounting holes 180 deg apart. Of those there are at least 2 different size alternators. The larger one will not fit your 289 mounting bracket, the smaller one will. If memory serves me, I used a smaller one from a 94 Mustang with 302 motor (5.0).
 

I know I'm going against the grain here, but I have delco 10si alternators on my engines and will be in 3 wire configuration. Not that I am against 3g, or keeping it Ford, nor is the hp drain a concern for me...LOL, but all those amps do take hp, and each individual cars needs electrically vary.  Plus the 10si does look a lot more period correct, and cleans up the wiring just the same, if that is a concern.  All the fancy chrome is available for those alternators too, if that is what a person is into.  I think the si series alternators, and the saginaw pumps are two of the better things the "other" guys did.    Here is a picture of my Galaxie engine, put together with used/recycled parts I had aquired over the years,  with the exception of the cam/lifters, and air cleaner.   I the plastic fan is no longer there. I switched it out for a metal fan.  Wish i had a picture of it with it on there.  



 

Last edited by Greg B (4/25/2017 6:27 PM)

Rudi wrote:

Alessandro wrote:

i have found this : 
http://www.tuffstuffperformance.com/i-24486302-alternator-140-amp-hybrid-oem-wire-v-groove-pulley-factory-cast-plus-7078nj.html

Please let me know if is right . i can ask for  oem 3 wire and add the external regulator right ?

 Hi Alessandro, I would not use the one from Tuffstuff,  it is a 1st gen alternator with internal upgrades. It has an external fan compared to the 3-g which has an internal fan and regulator. I don't think that your existing original wiring will handle that one if you intend to plug and play it.

 The 3g needs some upgraded wiring but will give as much output at idle as the original alternator at full output.
 The one I used is like this one from RockAuto ( Remy 92313), about $135 CDN It is a short eared one used on V-6's.
 This alternator can be clocked to put the plug sockets wher you need them, I did.

http://www.rockauto.com/en/catalog/ford,1998,mustang,3.8l+v6,1304468,electrical,alternator+/+generator,2412
 You will have to use an different adjuster and bracket as  the O/E one will  not work.
 I made one up very similar this from Summit just because I could and  they cost about $70 USD.
https://www.summitracing.com/int/parts/sum-420104/overview/
 I also found that the original ammeter is basicly worthless, thats why I suggest a voltmeter.

 Ater I got mine I decided that it was too dull so I did this to it.


Before I reasembled it,  the stator and rotor were painted with "Glyptal" a coating used to prevent corrosion in the electrical industry.


Here it is installed.

 I hope this helps!

 
Thanks Rudy please tell me if is a small body or  large body alt ?
In the dash you changed the ammeter to voltmeter ?   Are There voltmeter for mustang dash  ready to bolt or i got to adapt something ?

http://www.rccinnovations.com/index.php?show=menu-mustang-all#volts

This guy converts the factor amp meters to volt meters.

Rudi wrote:

I would guess that mine is a large body alternator, it is the stock size for a 96 V-6 Mustang
 As for a voltmeter that will replace the stock ammeter, I did see one in a magazine once but I don't have any particulars, perhaps some one else can chime in if they have seen one.
 My voltmeter is an off the shelf Autometer gauge fitted into a modified stock bezel.

Thanks Rudi , For my limited information and knoledge the large 3G case will not fit the 289 mustang 66 i got.
this is what i found on the web and this is why i am so in pain choosin one . I dont wanna buy somehing wrong.

 

Thanks all , i need to pick up parts and print some specs, then call friends that " speaks electric " and let do the dirty job ....
now pick up the pieces !
Greetings!

JSHarvey wrote:

http://www.ebay.com/itm/130-AMP-1-WIRE-FORD-REPLACEMENT-ALTERNATOR-/142364413941?hash=item2125948ff5:g:u7YAAOxyM89Sas4x&vxp=mtr
This is who I bought mine from.  He even wired it to run the idiot light for free.

I have 1965 289 it fit just fine with the stock hardware.  The seller will put on whichever pulley you need.

Can't beat his price or his service!
 

Thanks !
 Take note that i am abroad and i think he want core back .
ship heavy items are always high cost .
Add shipping and tax and cheap become high.
I have done my homework  and search what i think is good for me . 
i believe that paperformance has all that i need ( alt +wiring) . 
462802C   wiring conversion 1g  to 3g 
1614e   95 amps alt v belt
With this will be all right .... 
Bye