This points to the failure of the straight weight/displacement method of determining competitiveness. So, I'd argue that other than classing the not otherwise classed, it's time to move on to spec lines for at least motors, and leave the reminder of the modifiers in place. Maybe even make a flow chart so that Tech has a coherent way to check ultimate weight.
I put this in my request #14859.
Don't forget that in GT/Production the open cars get to remove their windshield's and have asymmetrical cages to minimize air drag and top weight. So the ST spec roadster (even with a hard top) would be slower than the GT/Production version. Prather has the data to prove it as well.
http://prodracing.com/prodcar/viewto...15691&start=10
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