Dual field alternator wiring

Cosgig, your post is confusing! You state you had already changed to the new style regulator (one with triangular plug) but the new style regulator switches the field to ground and the old style switches power to the field. You car would not have charged with the new style regulator and the old style single field terminal alternator.

With the new style alternator there are three terminals one for the output and two flat spade connectors. The spade connectors are attached to opposite ends of the field windings. If you had wires hooked up to those terminals one way and the car won't run then switched them and it did, you have something wrong in your wiring some where. Because an alternator generates AC current there is no polarity on the field windings so it doesn't make any difference which terminal the one with power and the one grounded through the regulator are connected to.

Even though you got it working I would not stop trouble shooting the problem because for sure it will come back and bite you at the most inopportune time.