Seriously Need Help

Could be a problem and could be normal. My favorite thing to harp on, because it IS an actual thing, is voltage drop in the ammeter circuit and also in the ignition "run" circuit----which also powers and is the sensing circuit for the VR

And don't ignore the battery ground path

Problem areas in the ammeter circuit is any terminal or wire terminal end, including the eyelet at the alternator output stud, then the terminals in the bulkhead connector, the terminals at the ammeter and the ammeter itself.

In the ignition "run" circuit, it's the above, plus the terminals at the ignition switch connector, in the switch contacts themselves, and the bulkhead connector terminals where the dark blue "run" wire passes


You need to take voltage measurements under load and see if there is a big drop somewhere.

With the key in "run" and the engine stopped, stab one probe of your meter into the top of the battery POS post. Stab the other into the blue "run" wire feeding the coil ballast resistor. You should measure very little the less the better, and anything more than .3 (3/10 of one volt) chase it down. You can also use a relay to supply the "run" circuit and relieve the key switch and bulkhead connector of that load

Ground, same idea. With engine running/ charging on fast idle, check with everything shut off, and again with headlights, heater, etc powered on. Stab your meter into the top of the NEG battery post, the other into the VR mounting flange. HARD--to get through rust, etc. Again, the lower the reading the better, zero is perfect