1968 Dart ... Need wiring help

A325ic,
I take it that the vacuum pump needs 12vdc to operate, do you know how much it needs under load? How many amps does your current alt put out? Do you have other add ons to the elec system which are pulling additional amps? I would suggest a 90/100 1 wire alternator that connects to a 12v source with a self contained voltage regulator and a 8/10 gage wire going from the alternator direct to the starter relay. Crackedback here at FABO sells a Alt Wire setup. That way no need to go into the dist block. Also then delete the factor voltage relay and wiring.

Marion