'71 Duster 340 Battery getting overcharged

at 2500-3000 rpm 14.5-15V...seemed to average around 14.7. Should I declare victory or is 14.7 too high? .

This is passable but you likely have voltage drop in the ignition harness. That is what the test was about "in part". You want the VR IGN terminal to be as "same as" the batter as you can get. Every single 1/10 'th of a volt drop in the ignition circuit ADDS that much to the charging voltage. That is, to say, if the regulator is "trying" for 14, and you have .7 v drop, that will give you the 14.7

That is not dangerously high, for now