Dash lights will not turn off!! 72 dart

And it's WAY over 36A when guys put big alternators on, and the battery is low, or as you say, big stuff like pumps, fans, big stereos, driving lights, winches, etc etc. A big problem around here used to be snow plow hoists

"Ma" knew this was a problem long about clear back around 70. Some of the "C barges" had shunt type ammeter circuits. AKA the ammeter had small wires to a light meter. And the big optional 65A alternators had modified wiring became known as "police/ taxi/ fleet" wiring. This partially routed the ammeter wiring around the bulkhead connector, but you still had the possibility of ammeter failure.