Nice truck.
Continue to lightly sand (by hand is better than a DA) the hood sides, the underside of the hood, the tops of the fenders, around the fuel filler, the dash, the rear bumperettes (should have duplicates of the front bumper markings), and the tailgate to check for other markings. I can't make out what you have in the photos well enough to make out what you have except for a bit on the bumper that looks like an "arty"...
For an Korean era Army truck, you'd want the 23070 (heck, do a search on this site for some of David Doyle's wonderful posts on the color shift in the specification green between 24087 FS595A and FS595B that make the Gillepie 23070 closer to the original color). The Gillespie is a bit flatter to me that other paints using the same chemistry, so the 23070 may not be as glossy as you think (unless you've done some patch panels with the spray cans as they are a very good match to the material in the gallon cans...).
I personally am fond of M37's (and others) in 34052, Lusterless Forest Green (USMC Green).
It'll look good whichever green you use.
BTW: Found a collection of pages that allows you to browse through colors in the exact order they have been grouped and presented in the Federal Standard 595B Fan Deck. The page captions (given in parenthesis) are arbitrary and have been added for clarity and variences in computer monitors need to be accounted for, but it an interesting view of colors...
http://www.colorserver.net/fandeck/
Good luck.
