1966 chevelle with 283 cu. in.

the r terminal only has 12 volts on it when you are cranking the starter over. so the wire that goes to the r terminal goes to the plus side of the coil then the wire that come from the switch also goes to the coil this wire should have only about 8.5 volts on it when switch is in run position the r terminal puts 12 volt on the coil while cranking the motor over the when the switch is in the run position there is 8.5volt on the points so you don't burn the points out the diode kit i don't no why you need it unless the don't what any back feed volt to the r terminal in the run position so i would put it in line(series) with the r terminal wire the flow on the diode is from the -<- this side of the diode goes to the coil