[Jeff Lee]

If I'm off on total pricing, it can't be more than 10%.

If you fix the "wobbly" end of the spectrum (the stud mounted rocker arm; as found on GM / AMC / FORD), I really don't see that it will increase strain to a point of breakage anywhere else on the engine. If the goal is limiting the performance or adhering to "Stocker Purity", i.e., valve-train limitations, then everything mentioned in my list should be banned outright and all components should resort to OEM parts and specifications only.

But I've always been lost on the concept of allowing full-bore race modifications and parts as listed below, but keeping one breakage prone part which can (and does) lead to complete engine failure.

I guess the wording of a rule would read something like "mounted in same configuration as OEM"

Where does it all go? I've often thought Stock will (regarding engine) eventually be limited to restrictions on factory valve lift, factory carb, intake, valve sizes, piston configuration, bore and stroke. If I missed something, I 'll assume you get my meaning.