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The mount of all three is a J-180 Mount. 27SI is the oldest and 21SI then the 22SI. The 22SI the the exact same as the 21 except it has @@ stamped into the back and longer brushes. The only way to make a 12 into a 24 is change the sator and regulator. Better off buying a 24V. Not sure what...

Sorry i have been away. You only need the hot wire on the alternator the other is just going to be taped up.

not sure what you are replacing but the shaft size will be the same. If you can find some one with an impact it will take about 3 seconds to change. The alternator is a 27SI series been around forever. They run about $105 new so I hope you did not get stuck too bad. If you have a vise you...

Every now and then i will find "take-off" units that were installed at factory and then changed either for a different spec or manufacture and i will rebox under our part number but do not pass it on as OE. And that is automotive I have not seen any in the heavy duty side.

Delphi is only automotive.

WPS is a product distributed by weatherhill and associates. Comes in a blue and yellow box. It will have a lester catalog number and then a "N" at the end. Delco will be in a red and black box labeled delco. What part # is it? WPS is crap. I sell tons but it is because some people want...

Just joined today. I own an alternator shop in Houston, I am a prestolite- leece neville dealer. Also have tons of the 22SI 70A if anyone needs one i will cut you a deal.