Another timing curve question

It might be a long time before I get to a strip (nearest one is over 90 miles away!). But I can watch the wideband while hitting the gas hard enough to open the PV without getting into the secondaries. Or just disconnect and wire the secondaries to the idle stop. If it's going lower than 12.5:1, wouldn't that imply that the PVCRs need to be reduced anyway?

If I take the bowl & block off again, I could measure the idle restrictor too ;)