'71 Duster 340 Battery getting overcharged

Thanks Rustedwrenh. I'm off to help a buddy build a deck now...but I hope to pull the alternator tonight and go see Autozone tomorrow or Saturday for sure. I think I'm getting a basic understanding f what's going on. The green wire IS important as it controls the alternator like a throttle...but the alternator I have has that field grounded and there's no input to the regulator so it can't control the alternator output even though the regulator would like to as it is seeing high voltage from the blue wire input...did I get that right?