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....Add to that,I think they pretty much new 99.9% of all new car Hi-perf owners were going to pitch the entire A.I.R. system within one hour of taking delivery anyway,so it getting in the way of adjusting valves would become a moot point.
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Rick,
That is exactly what I believe the rationale was for use
of only the over the valve cover tube design. Does anyone
remember seeing a SHP engine with the AIR system intact
back in the day? I sure don't.....
Taking off the SMOG system didn't cost anything. You
gained some HP! Weren't we all trying to squeak as much HP
out of these cars as we could?
And as you've observed, GM knew most SHP owners were removing
these systems to gain HP. So it was a
Steve