The post about WEP duration in one of the other forums got me thinking about this:
The R-2800-8(W) with water injection wasn't introduced into the production line on the F4U-1 until after the switch to the bubble-top canopy, with all these F4U-1s built with the bubble canopy being redesignated as 1As. Very few, if any, Birdcage Hogs used the 8(W) unless they were retrofit in the field.
Since we now have the F4U-1A, WEP should really be removed from the F4U-1.