[Kurt in NJ]

Look in a 40s, 50s or early 60s Motors manual, the advice to use the analog meter is good, the generator and ignition system can give modern digital meters a fit, most likely the reley with the fine wire windings is the voltage one, making the spring tension more ( a picture of the inside of your regulator would help) should raise the voltage----You should check it with the cover on, temperature changes will alter the adjustment some -----find a motors manual (possibly a chiltons), it will work you through the procedure.