Low volts at idle
I have already checked and replaced my alternator and regulator and replaced the wires that go to the alternator but with no change
I don't know what this means?
Are you still using the old style "roundback" alternator?
http://www.forabodiesonly.com/mopar/showthread.php?t=187013
Have you read the MAD electrical article?
http://www.madelectrical.com/electricaltech/amp-gauges.shtml
You say "Replaced the wires" which means exactly what?
Many guys have gotten away from the original old style round-back design. Even simply going to the 70's later "squareback" design is some help. If you do some searching, there's lots and lots of posts about conversions to other designs, including Delco integral, Denso, Ford, you name it.
This is all in the alternator design, which was improved some in the squareback. If you still have the 69/ earlier type system, you can easily use a squareback simply by grounding one field terminal. The older design alternator simply is unable to output as much at very low RPM.
You may have multiple problems. Voltage drop in various harness connectors, including the bulkhead connector, may be adversely affecting your voltage in the car at low RPM
The other thing is, "what is your load?" and "what is your idle speed?"
If you have halogen/ etc upgraded lights, or other accessories, this can certainly load the system, and if the idle speed (stock /6, etc) is too low, that is a factor.