YUP, Another charging issue thread

Reading 12 volts on the meter.
I had the alternater tested and they said it passed the test.
could it be boarderline good? shouldn't it increase from 12 when you give it alittle throttle? this is a square back with a built in regulater

No 1970's-1980's square back Mopar alternators that I know of had a built in regulator!