What was the a/f ratio on the dyno? Did the carbs have the same jet plates in them?
Unfortunately, no a/f numbers - that function wasn't working that day (a catastrophic failure on a previous test had taken them out).
No on the jets, the carbs have been completely rebuilt and re-jetted since then. The test was run with a ProMax metering plate on the center carb. Since then, I've replaced it with a stock metering block so I can run vacuum advance.