Not getting 12 volts to coil

An inline spark tester is $5 at Harbor Freight. Insert it in a plug wire to verify you are getting spark (neon lamp flashes). You can disconnect the HV wire from the coil and place it near bare metal on the engine or car body. A good electronic ignition should be able to throw a strong spark 1" in the air. See youtubes. Not so far at the ~150 psig in the cylinder. To assure it isn't a fuel problem, disable the fuel supply (so not rich) and see if it runs on starter fluid sprayed down the carburetor throat. The ether has a very wide flammability range so you don't have to spray shots precisely to keep the engine running.