You would generally find interior parts of the WWII vintage aircraft painted with zinc-chromate primer. It is a yellowish color. The cockpit interiors were generally interior green (FS color? anyone). A few years back I was at "Thunder Over Michigan" and there were about 10 AT6, SNJ, Harvard (Canadian built AT6s). There was a discussion about the "differences" in these variations of the aircraft. Would anyone like to point out some of those differences? Are the differences mostly in the interior or under the cowling. I was not looking for anything at the time, but they all looked the same to me (other than paint schemes).