Ammeter to Voltmeter...who does it?

Quick addendum....my Service Manual only lists regulator P/N 3438150...mine is 3755850 (no mention of it in the Service Manual), with a date code of 235 (2-6JUN75), so I know it's the original. My regulator, when I Googled it, is for 100 Amp alternators, so apparently the Warren Plant built these chassis cabs with the understanding that they needed heavy duty electrical systems, but I seriously doubt they installed the Leece-Neville 100 Amp alternators. IIRC, the Leece-Neville units had the battery post, a smaller round ground post and only one field spade connector. My wiring harness is not setup that way, which tells me that it had a regular Mopar alternator, but I wonder if the wiring and ammeter are actually engineered to handle the extra amperage, without melting down. If they are, I can just buy a regular Mopar alternator rated for 100 Amps and swap it in.