Revell or Monogram has some quality control issues concerning the artwork of the decals. I don't have the kit nor its instructions, but this was taken from the decal and markings info from this kit review.
modelingmadness.com/.../5255.htm
Decals are said in the review to represent the following aircraft. From the earlier comments on this thread, I believe that Revell made the mistakes and not the reviewer.
1. P-39D-2, 51st FG, North Africa 1943 in olive drab over neutral gray.
2. P-39Q, "Devastating Devil", 49th FS/15th FG, Canton Island, 1943 in Sand over Duck Egg Blue.
3. P-400, "Hell's Bells", 347th FS/67th FG, Guadalcanal 1942, medium green and brown camouflage over light gray.
The Sand over "Light Blue" P-39Q 'Devastating Devil' belonged to the 46th FS, 15th FG, based on Canton Island in the Central Pacific. The Group was assigned to the 7th AF based in Hawaii. Apparently 46th was misprinted as 49th.
The 51st FG P-39D-2 is probably meant to be from the 81st FG, which did fly P-39s in North Africa. It could be from the 350th FG or the 68TH OG. The 31st FG did fly the P-39s from England for a short while before converting to Spitfires.
P-39D-1/2/3/4 info.
www.joebaugher.com/.../p39_6.html
And it should be the 67th FS, 347th FG, not the other way around.
Hope the info is of some use.
Grant