Alternator swap, connect field wire to itself?

So am i confused. Am i supposed to connect a ground wire from the back terminal to body ground? I am using the vr128 with this, no issue. But just switched to HEI which meant disconnecting the old coil which had a small ground wire going to the alt bracket? Lights are now pulsing heavily. Was. Supposed to reconnect the little ground wire to something to ground the alternator? Hellp. Or am i supposed to run a ground from grounf terminal on alt all the way to the new vr128 regulator?