Switched Coil now it wont start. 1972 Swinger 318

Do you have voltage to the + side of the coil with key on? If so, how much? Now go to the - side. With the key on (ign) do you have voltage? How much? Now have someone crank the engine over & watch for the voltage to change as you crank it. It should drop toward 0 & back up again (you can use a test light for this & watch the light flash) for every time the cylinder should fire.