73 duster wont crank

Ok I'm lost, car starts now after doing tests and everything testing good, must have been loose connection because I didn't do anything else. So I check the charging and nothing. I then replaced the switched 12 volt on field wire nothing, replaced wire because insulation was cracked. Replaced voltage regulator and starter relay. Now charging.......except over 16 volts at high idle. No what do I do???????@??? Help please:banghead: