Hello ,,,, noticed that the newer gen 3 alternator does not have the stator pin on the back like the 1st gen alternator does . Where do you trust changing the power wire over to for the electric choke ? Off hand I was thinking the ignition switch side of the coil but is that a good idea ?
Just a little more edit . replacing a gen 1 alternator with a gen 3 is not a simple R & R . # 1 , no electric choke hook up if you still use that , # 2 the old spacer is too wide now , #3 the back of the newer alternator hits the cylinder head so # 4 your going to need to shim the old brackets forward with washers . Just what I saw hand fitting it .

 

The more common nomenclature people use are 1G and 3G.

Hooking the choke to the keyswitch is not that great. If the engine has a problem and doesn't start right away, or you are messing around with the radio or something and have the key turned on for a minute or 2 and then go to start the engine, it's not going to want to start, the choke has been warming up while the engine wasn't running. That is why they hooked it to the alternator stator terminal.

The diagram in this link shows a small terminal labelled wht/blk. That may be the external connection for the stator/choke. Does yours have this? Looks like a little black square on the back of the alternator. Check this link. https://www.fullsizebronco.com/threa...s-agian.26658/

Stands to reason a higher output alternator is going to be bigger physically in size. So the bracket modifications are part of the requirements to get it installed on most vehicles that had a smaller alternator. You may also find you get a belt squeal after first startup in the morning. A single v-belt is not really large enough to drive the 130 amp alternator at full output. So when the battery is low, the regulator calls for full output and it will slip. They make special regulators that have a delay in them to try and cover this up. But you will notice most of the vehicles that you cannibalize to get this alternator will have dual v-belts or more commonly a serpentine belt which can handle the extra load without slipping.

 

Its got a double pulley although its wider than the old pulley , doing a switch there , but concerned about belts not running straight .
Now I see there are 2 hole front and 4 hole front described alternators , Are these all the same length front to back ? Not the width I am concerned about , This 4 hole was sold as a 120 amp rated unit . Rebuilt .

 

There are all different kinds. They fit on trucks, front wheel drive cars, with all different kinds of engines and mounts. I didn't know there were 120 amp units, I thought there were 95 amp and 130 amp units from Ford. Some of the 130 amp units were found in front wheel drive cars where they had electric cooling fans.

 

Well after not admitting defeat I went out and gave it a second try . The wide end of the 3G was the same as the original alternator so I worked in the spacer and that seemed not overly pushed apart , so I did have to shuck in a washer for a spacer on the top arm bracket to water pump move that out some . The old pulley needed a shim and the belts lined up good . And it works . Electric choke is on a toggle switch for now .