Alternator/charging questions

The battery is an optima. Cranks over great. I don't drive it long enough at the lower rpms for it to drain the battery. It usually only happens at a stop. What about going with a better setup like the one wire alts? is this a waste with my minimal electric requirements? And 67 dart, the msd was on when I had the single field and the other known good squareback alt. I guess I know I need to get another alt, but should it be another stock squareback or should I upgrade to something better. Not planning on any more electrical additions other than maybe an electric fuel pump one day. Whatever way I go, I have to have the billet pulley swapped. Is there a way to do this without a press? Thanks