Looking 4 A Lil Spark

Hello everyone. I have a '83 Bronco and am looking for a test/inspection chart for a no spark condition, voltage paramaters ect. It previously had a 5.0L, but now boasts a quite large 460 carb unit with MSD coil, cool guy wires, ignition box, yada, yada, yada. The big horse has ran great in past, yet seems to be a lil tempramental lately with the electrical. Any suggestions and detalied info could be of benefit.