it had the old style regulator with the dual field square back alt.. it worked 10 years ago but after firing up the new engine it wasnt charging i had the alt tested -ok so i replaced the old regulator with a "new" style one. rewired it and it was charging at 13.5 at idle-perfect
It sounds like when you rewired it you missed something As a minimum you have to run an additional wire from the alternator to the voltage regulator when you change from the grounded field to the ungrounded field alternator.
Charging Circuits
