Did you see the thread I started about alternator guts?
Take a look. What Jaws posted about grounding one of the field terminals will make more sense when you see the innards.
The squareback alternators have bigger rotors & stators and thats why they potentially can make more power at idle than a roundback.
When I hook up the second field wire to the ign 1 at the ballast like the wiring diagram says, the dash volt meter pegs to the negative side so I must be doing something wrong