Thanks guys.
"Magic Carpet" appears to be from the 366thFG rather than the 371stFG, but the similarity of schemes is evident. It looks to me like "Mumbling Joe" retained olive drab on the upper wing surfaces.
With "Magic Carpet", the color of the bare metal appears the same in both the cowl and cowl flaps, while on "Mumblin Joe", the cowl ring is much lighter/brighter than the bare cowl flaps. It could be, as Devil suggests, a trick of the low sun angle.
To me the color of the cowl ring looks closer to the white tail stripe than it does to the bare cowl flaps.
I'll look for some more photos of 371st a/c; perhaps those would help identify if that group standardized on bare cowl ring like the 366th did?