FWIW as a comparison.
Chrysler's test in the '73 shop manual is for less than .7 Volts drop in the main circuit (alternator to battery) with 20 amps flowing.
That test is done with a carbon pile to create a load.
Remember above I said if I drew what you described correctly, we see a 1 Volt drop between the alternator and the main splice?
That's a lot more than the Chrysler's test considers OK. That's 1 Volt drop with what? 8 amps? through one or two connectors.
Chrysler's test is .7 Volts drop with 20 amps going through all the connectors between the alternator and battery positive.