Where is the voltage regulator on a 1972 Chevy truck?
If it is an external regulator, it should be located on the driver's side of the engine compartment in between the headlight and radiator. It has a square cover and a plug with four positions on it.
I don't know if any '72s came with internal regulators. But in any case people do sometimes change the systems to internally regulated alternators. In which case the regulator in inside the alternator.
No a 1972 Chevy pickup is not the same model as a 1973 Chevy pickup. I believe it goes from 1967-1972, 1973-1980, 1981-1987. Doors will work from 1973-1976, 1977-1987. You would need to find 1972 doors as they are the only ones taht will fit a 1972. 1967-1971 are the same but there is something different about 1972 doors.