Looks like I won't be making Dyno Day after all.  I pulled the heads on the Vee and found 2 burnt pistons.  One engines going to be headed to be rebuilt next week.  I'm going to look in the attic in my parts stash and see if there's a matched set of jugs and pistons and think about cobbling something together so I can race at Road Atlanta on the 27th.  It wouldn't look like much on the dyno, but I could still score some season points with it.