Some odds and ends about the Pertronix ignition -
(1) The firing unit is designed to operate on the full 13.5 volts of the "12v" ignition. If there is a ballast resistor in there, it shouldn't be in the red power lead to the controller/firing unit.
(2) I can see in the photo - that the ground to the distributor is NOT jumpered to the moving point plate. If you look at the usual point ignitions, they have a braided connection between the moving point plate and the body of the distributor. The Perrtronix requires this same ground. I usually make sure a set-up like this is grounded clear back to the block. Many times it has been found that as the point plate moves - the ground changes - and it reduces the voltage to the controller.
(3) Many have found that conventional coils don't like full voltage - and they overheat and fail when exposed to such a current load. Best to retain a ballast resistor - if you don't have a high temp resistant coil.
Steve Metzger Tucson, Arizona