flickering lights 66 dart

ok well put in new regulator, it is a little better, the alternator is a newer autozone type replacement, there is a ground strap from the block to the firewall, it still does it a bit when idling, but it has a radical (for a 273) cam in it so it does not idle smoothly. It seems under rpms it is ok at this point but I have not driven it yet so we will see. I hope that fixes it because man it sucks driving with the lights doing that you think you're going crazy!