The 340 is out....again.....

It won't. Let's do some math or research as others suggest...
Using 8"x8" sump from a factory pan, which for full disclosure does not include the curved corners, etc of the stock pan so 8x8 is more volume than actually there:
Using the factory ".1875 max" off the pan leaves 6.6oz, or .2 of a quart of oil under the pickup.
Using the same volume: using my "high" of 1/4" or .250" that leaves 8.8oz, or .275 of a quart under the pickup.

I remember the plus number being .187 or 3/16.

You math is correct. You just are not accounting for slosh. That's where the trouble happens. Oil control is a mother bear. Most everything I do any more has a crank scraper. In fact, Teflon and both an up and down scraper.