Yes, I keep forgetting the ST ruleset is segregated based on displacement. I tend to agree that those larger displacement cars should not be in the U class as it creates inconsistencies that don't jive well with me.
I do believe that had ST used a classing process based on valve curtain area and displacement then it would have been possible to equalize the various engine types (small OHC four valve vs. large OHV two valves) without having "under" and "over" classes. An IT on steroids that would have had a broader mix of cars competing against one another in the same class. But that ship sailed long ago and ST is fine.
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