Tuff Stuff 100 Amp One Wire Chrome Alternator & Custom Made Bracket

Tuff Stuff 100 Amp One Wire Chrome Alternator

Price: £120 – £150


When I bought the car it was dead, no wiring, no electrical connections on the engine at all. Sure there was an alternator on there and I still have it. I don’t know if its original or not, I seriously can’t imagine it is, it looked like it was on its last legs anyway. So as I was getting a new rewire kit from American Autowire (link here), and it would need a one wire alternator, I decided that as I am replacing it I might as well get a chrome one. I have visions of my car with lots of chrome on it. I also wanted an update from the 48amp in order for me to run halogen lights that I want in her, and have plenty of power in reserve.

I started looking around and found a supplier eventually who told me the chrome version was only a few pound (£) more. Result,  I ordered it. Was it worth the extra money?

In the Box:

The box had on the outside “our chrome will get you home”. Brilliant, it will look good, and get me home safely. People will say what’s the point? Simple – I know it’s there and that is a good enough reason, end of!

Opening the box,  the alternator was inside nicely wrapped in plastic and lots of cardboard to hold it in place. Simple leaflet that basically say put positive wire here, and to top all of that – a nice sticker of the logo. Awsome, that’s goin’ in the man cave.

The alternator was highly polished, finger prints showed up on it and I was well chuffed with it. The fact that it was going to make my fitting easier, look good and do the job, all bonuses as far as I was concerned. I obviously bought the Ford fitting version and compared to the old one the holes were all in the right places. It was a little bit bigger but nothing to worry about. This version has the internal voltage regulator as well so I could bypass a potential weakness on my old classic.

Note where the location of the terminal stud is on the back.


I picked a nice day, after I had got the wiring all through the engine bay to where I wanted it all to go to. There is a bracket that allows a the alternator movement to tighten against a belt, a long bolt, spacer and that is about it. I put the alternator to the main pivot point at the top, added the spacer and put the long bolt through to the block, and tightened to almost finger tight. Brilliant.

Next was the bracket at the bracket at the bottom, this is mounted via a bolt near the crank pulleys. The bracket has a kink in it to allow the alternator fitting at the bottom to fit it, as a straight bar would hit the side of the alternator case. Due to the location of the bolt there is a step on the bracket to move it back in line with top fitting. This is a standard bracket (at this point of fitting). Bolt applied and was located on the bracket at about 2/3 to 3/4 of the bracket movement. Not so good now.

On inspection and trying to sort out why it would not travel the distance caused me concern. I could hear a dull thud when I let the alternator try to fall to vertical from the pivot bolt. Looking at the back I found the very big issue. The stud bolt for the main positive battery charge was hitting the side of the engine block. No worries I will move it up. Bearing in mind that I would need a belt and room to adjust it, this was going to be tight. I pulled the alternator to its max on the bracket, the clearance due to the angle of the bracket only gave me about 1/8 inch 2 to 4 mm at the most. Considering the amps and vibration involved this was not far enough away for my liking. Also, the fact I would have no adjustment on a belt what so ever. This is now bad. I had to pay for this alternator they are not that common, so I couldn’t just return it.

In short, it does NOT fit a 66 Mustang 289 block without

a) being dangerous


b) without a modification to the bracket.

I took the choice to make a mod, the money is a premium right now and nobody is really going to notice the part I have in mind. I had a bracket made for me by my mate and senior mechanic consultant (I bet he like that bit), his name – Will, from his own business at Park Garage. I have got the review and spec of the part we came up with in a little section below this review. They are hand in hand so I put them together here, if that makes sense?

The belt:

This was interesting as it was not ever going to be a standard Mustang belt. The new bracket allowed me much more adjustment and the rear stud is now a good 3/4 inch away from the block. No chance of an earth out or spark jumping from the alternator to the block, that could cause a total failure or even a fire while driving along.

Tip: as I had no idea of the size belt, I used an old piece of rope to wrap around the crank and alternator v-pulley. Mark the join and stick the two ends together. You now have a guide size to compare the belts too. I bought a couple of variations on the size, to save extra trips if it didn’t fit. My first choice did fit and I took the other two back for a refund.

The belt I got to fit? A much more common Saab 95 belt. Cost? very low and the alternator is now a 1/3 of the way up the adjustment, plenty if I need more.


(After bracket fitting of course).

It works and it outputs the charge to the battery. There isn’t too much to say about it other than that. The front face plate reverse has the cooling splines that work well and should not overheat when the current draw gets heavy.

Long term road test is not available as I can’t drive the car legally at the moment. I expect that due to the overall build quality, it will last mechanically.


It works we have established that.

Appearance: RUBBISH (for the use of a polite word). After one year the chrome has pitted and even come off. Now, I know it was outside and in the cold. BUT, it was under a custom fitted Storm Proof cover, and in a sheltered space. There is no excuse for this to happen. It just shows that the chrome was so thin I may as well be sprayed on. I’m not happy about it at all. Check the pictures of the pitting.

The picture is larger than I normally upload so you can see in detail the damage. I have marked the pitted areas in red.

Tuff Stuff chrome pitting

Tuff Stuff chrome pitting


Difficult, this has me torn a little, one side of me says low marks and the other side says it works.

So based on the facts that I had to have a bracket made, the stud is in the wrong place, and the chrome is coming off, vs, it works. It won’t be high as a main reason for me buying it is it was to look good, but now it has a potential to look rubbish and ruin the effect. I now know that under the hood I have a rubbish looking alternator, that just does its job.

Was it worth the money? I don’t think so, There chrome won’t get you home as it will flake off before you get there.

Rating: 5 out 10


Alternator Custom made Bracket:

Price: £10 + strip of metal & few beers!


This was a necessity due to the design of the alternator. I tried locating the standard bracket in different places. But there was either no clearance or the location did not allow the alternator to be fixed correctly.  So I put the spacers away, washers away and various nuts & bolts away.

I tried to measure out the location required for the alternator as well as the positioning for the bracket in its original location. I had measurements in mind and took my idea over to Will. He listened and tweaked my idea a little. He then cut, welded and sprayed my bracket for me.


Will’s mod to the bracket allows me drop the bracket lower down to avoid the case. This in turn allowed the adjustment side of the bracket to move the alternator away from the block, its lucky that the Mustang engine bay has enough room around the engine to allow this mod.

Fitting was fine after I drilled the hole where I wanted it to go. I managed to position the alternator adjustment nut at the bottom quarter of the adjustment. Tightened the nuts up job done. (I then made my template for the belt, see the tip above). Purchased the belt, and fitted it. Well happy.

I have pointed the bracket out in red and also you can spot that I cable tied the wire to the bracket to keep it in place.


It works and does its job. This is a bespoke build and design, I am also desperate to know how other people get on with this issue of the one wire alternator.  American Autowire recommend the one wire so others must have fitted them. Was it just this make that has the issue?

The only slight point is that the belt is close to the bracket. Time will tell if I need to revise the design to allow more clearance. I don’t expect I will need to amend the design to be honest. So I am very happy. I will always carry a spare with me anyway.

Rating can only be full marks.

What did it all cost me? A selection of imported ales from around the world, especially America.  Cheers Will.


8 Responses to Tuff Stuff 100 Amp One Wire Chrome Alternator & Custom Made Bracket

  1. FirstHermine says:

    I see you don’t monetize your site, don’t waste your
    traffic, you can earn additional bucks every month because you’ve got hi quality content.
    If you want to know how to make extra money, search for: Mrdalekjd methods for $$$


  2. V8 Junkie says:

    Instead of making a custom bracket, why not relocate the alternator’s positive stud? This is done by ROTATING THE CASE! It’s called “clocking” (indexing).

    Detailed instructions on the Tuff Stuff site: http://www.tuffstuffperformance.com/pdf/alternator_clocking.pdf

    Caution: Don’t try this with the alternator installed in the car. Remove it! Then position it with the rotor shaft pointed up (vertical). This will keep the stator & rotor seated in the rear housing. Otherwise, the rotor might dislodge… then “the brushes and springs will need to be reinstalled by someone who knows how to rebuild an alternator.”

    More discussion: http://forums.vintage-mustang.com/mod-custom-forum/652800-1-wire-alternator.html


  3. Hey! I just want to give an enormous thumbs up for the good info you
    could have right here on this post. I shall be coming again to your
    blog for more soon.


  4. When it comes to producing fantastic content material
    you surely know your onions, congrats! ? !


  5. Pingback: Mustangs, Religion & Yoga! « One man and his Mustang – 1966 coupe v8 289 Restoration Project Car

Please leave me a Reply or Comment.

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.