Heya Shuckins,
Glad I could help. Keep in mind that those Docs are Grumman estimates of performance before they actually flew. Notice the climb is a bit high.
However Vought documents I have seem to list the F6F-5 as a 400MPH fighter. Funny Vought is the source I have that says that when I can't find Grumman with the same. In anycase I believe it.
!!
Always funny to see a post with my name in the header.