Having charging issues

Please go search some of your other threads on this and post the links here so we can review. If possible, post a photo of your alternator

What are you using for an alternator and regulator? That is...................

Is the alternator a "round" or "square" back?" How many field connector terminals does the alternator have and what did you do with them as far as hookup?

In the photo below, your original 68 looked something like the one on the left. You CAN and are BETTER OFF using a "squareback" on the right. But if you are still using the 69 / earlier regulator, you need to ground one of the two field terminals. Your original '68 only had one field connector



What regulator are you using, that is brand and part no?

What electrical testing have YOU done? Trusting "parts store" testers and people who operate them is no way to troubleshoot a car except for testing batteries (with a grain of sale) and in certain other situations.

In other words you are USUALLY far far better off doing some tests IN THE CAR under "operating" conditions. This allows you to troubleshoot wiring problems and so on, as well as components.