I wouldn't do it that way because if memory serves I'd lose the ability of the Alt relay in the CPU to pull in and light up all the Warning lights. Memory.
See the jpg attached? Red is from the switched Engine fuse power and if you look you can see that it will feed the field all by itself and more or less uses the same circuit as the power from the alt relay (Meter fuse pwr).
I find that picture out of the manual a little suspect in that respect. I may be wrong thinking so. One thing I remember when messing around was that if I fed batt voltage to the white/black terminal on the alternator, was that from then on I'd never get the Alt relay in the CPU to pull in and turn on all the idiot lights. I think some part of the internal regulator gets fried when doing that. What it is, is you lose the gnd in the alt that pulls in the alt relay when the alt is not turning.
That shouldn't effect you since your removing most wiring anyway and don't want stk functions like all the idiot lights coming on when the alt isn't putting out.
I'd just do what you suggested in your first two post i.e. splice a wire to the black/white to feed the terminal on the alt where the stk white/black goes and be done with it. You won't ruin the alt other than the circuit that puts a gnd on the alt relays coil to pull it in when the alt isn't turning.
Wrote too much.
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