After all of my careful writing, I still wrote it wrong. Meant to say measure voltage on HEI Positive and the ground.
Sound like your voltage is low. I am also concerned about the signal from your distributor. I would hope you would be getting at least a signal above the 20.0 or so. Are you sure the gap is ok on the reluctor to magnetic pickup? It is supposed to be 0.008". Be sure to check it woth a brass feeler gage!