Hello 73, If you do not already have halogens in your car, then that change alone will help a lot. If you do, then consider the upgrade unit, such as the Silver Star from Sylvania sold by Advance Auto (& others too I'm sure) If the firewall connector is not in optimum condition, then either bypass it, or use relays as suggested. Another possibility is to do both. My experience w/ Mopar alternators is that if they are working properly, you will see little or no dimming at idle. My '65 has the single field alternator, & it is barely noticeable. I think all E body cars will have the dual field unit as OEM equipt, & as such should be better than my single field unit. Ovmf