Check the battery terminals too! I had an experience after I installed the old Mopar Perf electronic ignition kit. After it was all installed, I test-started it 4 times, but the 5th time, noting. A new started solenoid did not help, either. "Voltage" was everywhere, but still no crank. In a close look at the terminals, I could see a thin bit of corrosion between the terminal and battery post. Pulled it apart and there was a thin layer of it on the post. Cleaned it with a wire brush battery terminal cleaner, put the terminals back on the post, and it fired up just like it should. A minor thing that caused a major issue.
If that doesn't help, then look for the "big red wire" coming out of the fuseblock, inside the car. Same color on the outside, too. That is the main ignition switch feed. On my '67, the inner connection terminal was a bit loose, so it would not make good contact. I could push it back into its hole and then things would work again. I need to crimp it a bit tighter, but haven't gotten around to doing that just yet.
Hope this might help,
CBODY67