Only cheap HEI works

Johnny Mac said
Yes. 15 I would call overcharging. 14.7 max is what I usually look for.

Make sure you bring the rpm up to check also.

I just came up with a plan to use the ammeter as a point to grab voltage from with a multimeter, and I'll drive with the multimeter running, see what it does with rpm, and load, with stereo and headlights, etc on