I bought a Bosch unit from Rock Auto for a 95 Mustang with a 5.0. Part number AL7534N. 

It's not a one wire alternator. You need a plug in pigtail to go with the power connection. I sourced it from the local pick a part. You should be able to but it new. 

What are you doing for belts? I could never get it tight enough with the typical alternator V belt pulley. Bought a Hi-Po pulley through Steve Buzek. Had to have some machining done to get the clearance I needed for the back side and a full nut to secure it. It's been good ever since. 

         

   

    

    

 

With 289, I ditched the 1G and installed a 10si one wire 100 amp alternator.
Purchased from Fleet Farm.

It was more than enough to keep the battery charged and run my entire car.

My stock 65 Mustang wire harness had absolutely no form of fuse or fuse link.
The wire runs from start solenoid to the fuse box.

The regular 3 wire 10si alternator is just as simple to wire in a similar fashion.

Now…here’s the catch…both of these alternators require the pivot hole drilled out to reuse the factory alternator bolt.
I didn’t like the smaller diameter bolt that GM used.

With the 5.0L, I am now using a 3G alternator (130 amp) in the 92 Mustang accessory drive.
This is NOT a one wire alternator.
Purchased at Fleet Farm too.
The wire harness is from a 2001 v6 Mustang…it has factory fuse links connecting to the start solenoid.

3G alternator is common on many Ford products.

Nos681 wrote:

With 289, I ditched the 1G and installed a 10si one wire 100 amp alternator.
Purchased from Fleet Farm.

It was more than enough to keep the battery charged and run my entire car.

My stock 65 Mustang wire harness had absolutely no form of fuse or fuse link.
The wire runs from start solenoid to the fuse box.

The regular 3 wire 10si alternator is just as simple to wire in a similar fashion.

Now…here’s the catch…both of these alternators require the pivot hole drilled out to reuse the factory alternator bolt.
I didn’t like the smaller diameter bolt that GM used.

With the 5.0L, I am now using a 3G alternator (130 amp) in the 92 Mustang accessory drive.
This is NOT a one wire alternator.
Purchased at Fleet Farm too.
The wire harness is from a 2001 v6 Mustang…it has factory fuse links connecting to the start solenoid.

3G alternator is common on many Ford products.

I also installed a GM 3-wire 10SI alternator in my 65, purchased from a local rebuilder, and drilled the pivot hole to use the original small block engine’s 7/16” pivot bolt.  This alternator’s tested output was about 70 amps, and I am happy with it, although I do not have any high-powered accessory equipment.  I’ll add that the internal voltage regulator did fail after several years, it was an inexpensive (like $10) and an easy replacement.  

 

The best thing about a 3g is it's sensing ability. I think the regulator detects the voltage drop from the starter, and tries to replace it with 130+ amps, straining a single v-belt.
The white regulator for a 3g has a 2.5 second LRC (Load Response Control) delay. Which should not "see" the voltage drop. I've never tried one as I have a serpentine belt setup. There is also a black regulator with a higher LRC.
This is all theory on my part. Never had to test it.
https://store.alternatorparts.com/f795-3g-series-12-volt-internal-voltage-regulator.aspx

Last edited by 50vert (10/15/2022 9:30 PM)