Vapor Lock!

The mystery is solved. I suffered my first attack of vapor lock. The conditions just happen to be perfect for it. I had gotten the engine up to temperature and it sat for 20 minutes or so. It started up no problem and I drove it about 800 feet and it died.

I tried starting this morning after some time and it ran without a problem.

I was looking into installing an electric fuel pump for some time, this is defiantely good motivation for doing it.