68 440 B body. I have a problem with the battery being "cooked".

I have new alternator, regulator and battery. I am registering 17 volts output at alternator, 14.5 at regulator and 16.5 at the battery. I have tried another alternator and still get the same readings. What can I do to get this back in a proper ranges since I am boiling acid out of the battery?