squareback alternator wiring in pre 70 car issue

I ran the blue wire like Brian suggested and it actually puts out less (12.1). Do I have to run the newer regulator to match the alternator or can I use the solid state older style? I'll double check the bulk head connections too. I connected the blue wire to the start side of the ballast. Does it matter? I am not much on electronics so it's a learning curve for me.