Dropped in a new Pertronix ignition and a Flamethrower coil in my SBC. After cranking with no results, I discovered I had hooked the red and black wires from the distributor correctly, but for some reason (known only to Murphy) I had hooked the wire from the switch to the coil to the - pole of the coil. Fixed that by hooking the ign wire to the positive pole. Still no start. Checked power to the + pole and it showed good. Then used one of those air gap thingies between the coil wire and the top coil outlet. Can't see a spark. By hooking the ign wire to the wrong pole on the coil and cranking the engine over did I fry something in the coil or ignition? What should I try next?