Motorola to Delco alternator conversion

I have a failing alternator on my 2640, early model with the Motorola alternator. My options are rebuild or replace. The trouble is I have never been happy with the Motorola unit and I'm seriously considering replacing it with a 3 wire 10si Delco. I was wondering if any one had done this on a Motorola before. I'm not concerned about the alternator installation itself, but the process of eliminating the external regulator for the internal, wiring has me wondering what kind of a mess I might be getting myself into. Any experience or advice would be appreciated.
 
There's a wire at the regulator harness that is fed power through the "idiot light". When it is grounded the idiot light will come on with key switch "on". Connect this wire to the Delco's #1 "excite" terminal.

Connect the large charging wire to the output of the Delco and run a short jumper from that terminal to the the alternator's #2 terminal. The other wires at the regulator harness aren't needed.

System should now charge.

For even more accurate voltage control, instead connect the #2 terminal with a run of wire to the main post on the starter solenoid where the (+) battery cable connects.
 
If your pockets are deep enough you could switch to a Nippendenso, then you won't have to worry about another alternator for a very long time.
 
Years ago when I worked at the Deere dealership we often did this switch. The easiest, fastest way to adapt was to use an adaptor harness from a 7520 tractor (old style). Plug the adaptor to your harness then plug the adaptor to your Delco alternator. Quick and easy, and not terribly expensive, either. Mike
 
(quoted from post at 21:36:20 02/21/17) You wouldn't have a part number for that would you? I couldn't find any thing that looked right on the JDparts site.

This is the alt wiring harness Mike referred to.
AR55283 Wiring Harness ADD 18.21 USD
 

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