F4U-1 and -1A................
Left wing tank to zero. Right wing tank to 25%. Then the main. 75% fuel load will last a looooooooonnnnnnggggg time.
F4U-4.............
Take at least one drop tank and hold on to it as long as you can. BnZ with the drop but you'll have to jett it for serious maneuvering. It's a gas thirsty beast.
F4U-1D and C. Your choice of 75 and a drop or 100 internal. Jett the drop as soon as you start seeing multiple cons.
FWIW,
-dtrip