Charging Issues,

Can you post a picture of the back of the alternator in your car? Without knowing if you have the older or newer alternator type, all the help will be just guessing. The different vintage of alternator types requires a different regulator.

Is this alternator new?

Look on the back of the alternator and see if there is just 1 single small terminal for the green field wire or if there are 2 small field terminals. (These will be in addition to the large output wire.) The original for your year car should be 1 field terminal (which is probably what was meant by '1 wire alternator'.... '1field wire'). The reason to check is that these cars get the alternator types swapped sometimes; you can't count on the parts houses to get it right.