30, 41, 46, 50 amp alternators? Yeah RIGHT

I experienced a wiring fire in my '68 Cuda back in '76. My brother played the radio all day draining the battery. When I drove home, the charge indicator (ammeter) was nearly pegged until the bulkhead connector overheated and started an under-dash fire. Luckily I had a fire extinguisher and put it out and limped home. A new junkyard harness (luckily they were available in '76 saved the day, but I put a 6 gauge jumper wire from the alternator output post to the starter relay battery post to bypass the bulkhead connector. Never had a problem since then. Now I would put a 4 gauge jumper and fusible link just to be safe, but so far what I did in '76 worked.
I noticed that you can look into the alternator rotor and see the amount of windings used which give a clue of the output of the alternator. But that requires disassembly and having two different rotors to compare. I disn't see any markings on the rotor to identify the output they would produce.
I am switching to a square-back alternator for my current build hoping it is up to the task of handling halogen (Marchal Ampilux) headlights and dual cooling fans. The car is in a restoration shop and they just fired it up but I wasn't there to see how it all worked. Will update on this later.