Warbird or not ??
C-130 comes to mind. It has cargo and armed versions. And the the AWACS and E6 are also warbirds. However, they are not fighters or bombers..
If you plan to enter a contest with it, grab a couple photos of the real plane in military painting. I think you only have to prove that a similiar plane existed. But, I don't enter contests so I can't be 100% sure.
Randy