Okay, I took a second look and here's what I found:

I originally used a test light to check for spark on the first few cyclinders. None of them showed spark. I changed to the timing light as suggested and found spark on all eight cylinders. So I do have spark.

I checked the distributor and rotor and thier good and tight. The ditributor postion is in the same place it was the last time it ran good. The weights are still together and are moveable.
The cap and rotor don't show any burn marks or significant wear. Also, the wires are new. I also had a new coil and threw it in just in case the spark was present, but not strong. No improvement.

I'm thinking about the timing chain. Although this build only has about 45 minutes of run time on it, so it seems unlikley that it woiuld slip, but it sounds like TOcan has run into that issue.