1975 Dart Sport - Alternator Issue?

An alternator should not cause the car to die unless for some reason the battery was already low. Here' an example. In my early days (early 70's) I had a 440-6 70 Roadrunner. I did not realize the battery was sulfated, and caused overcharge. I had moved the battery to the trunk. A friend of mine and I made a mad dash on a weekend from San Diego to Vegas. Damn battery about stunk us out through the trunk/ back seat. Next day we drove back WITH THE REGULATOR UNPLUGGED. Drove the care most of the way from Vegas back to San Diego WITH NO WORKING ALTERNATOR. I plugged it back in at some point thinking the battery was getting low. This was only running the ignition, no lights, no pumps, no stereo

You can not do that nowadays, with EFI