Gentlemen, I just upgraded my 1966 Riviera to a dual quad setup. After making sure all was as it should be I test-fired the engine and it fired right up. I could tell by the RPM's I had a vacuum leak so I shut her down to resolve that issue. When I went to fire her back up nothing happened except for the clicking of the starter solenoid. The battery is fully charged as it was when it fired up several times before, what could have happened in the 45 minutes between starts?