Alternator not charging

Update: tested the two ALT I had at advanced auto, both had bad stators. Bought new one square back 65 amp, which is for a 73 scamp 318. Hooked up new one, still no charging, however a few differences. First is that at idle my ammeter needle is slightly above the middle marker also under acceleration there is a slight discharge, is that normal. Second is with my multimeter on the battery post and I push the throttle the meter goes up a couple of tenths, it did not do this before. I'm guessing wiring now?