I think it comes down to what letter of the BVD you are building: (Boeing, Vega, or Douglas)? I believe each manufacturer built to different specs in regards to paint of fuselage spaces. And don't believe restorations as the exact final word on colors.
WIP: Monogram 1/72 B-26 (Snaptite) as 73rd BS B-26, 40-1408, torpedo bomber attempt on Ryujo
Monogram 1/72 B-26 (Snaptite) as 22nd BG B-26, 7-Mile Drome, New Guinea
Minicraft 1/72 B-24D as LB-30, AL-613, "Tough Boy", 28th Composite Group