It only took me four tries, but I finally made it. 328 miles hurts just as much as you think it would. Actually up until about 250 I was feeling pretty good. Then I got sleepy. I tried a 5 Hour Energy and felt great for about 20 minutes if that tells you anything. The last 50 miles were absolute torture; hills, headwinds, and loose gravel. No major equipment or physical problems. I don't know what I could have done better. I'll have more to write later this week.
Thanks to (in no particular order) Guitar Ted, Jared Morford, Steve Fuller, Jeff Frings, Mike Johnson, Dennis Grelk, Mark Johnson, Corey Godfrey, Charlie Farrow, and everyone else who helped me buck the headwinds.