Might've been similar to my 1981 "Albuquerque Edition" Ram -- a dealer package of options with dealer-installed decals. Mine was a 318 with a four-in-the-floor in Polar White with a bright (school-bus-colored) yellow stripe and decals.
Like with all first trucks ... hard not to love it.
I'm old enough to remember the Adult Toys: Power Wagon, Macho (the hi-visibility paint jobs & interior trim upgrades for the Power Wagon), Palomino (the luxe version of the pickups -- most were Power Wagons), Ramcharger / Trailduster, Little Red Express and Warlocks.
What does this "Pick 'em Up" look like? If it's a stepside longbed, it might be unique. If it's a LWB it probably is a set of options -- there's an album here about one: http://s767.photobucket.com/albums/xx316/pistolpeteusmc/power%20wagon/?action=view¤t=IMG00057-20100624-1022.jpg
I had one a few years ago. It's a part of the Adult Toys marketing campaign. It's one of the more rare of the optional packages, as far as I know.
Mine was a '79 150 4x4 shortbox Sweptline, 360 automatic. I think all of them were. Although mine was a little faded, it was dark red, with a multi-color stripe (shades of orange to yellow) wrapping around from the tailgate of the box to the door, then turning down to end in a large DODGE at the bottom of the door. It also had PICK 'EM UP on the tailgate in the same shades as the side stripe, and a small stripe on the hood, same shades. I have some pictures of it somewhere. If I find them, I'll post them on this.
I ended up selling mine to a guy in Eau Claire, WI in 2002 who still has it, although I haven't seen it on the road in quite a while. When I sold it, the body was really solid & straight, but the tranny was going out for the second time (reason I sold it), and the wiring was a mess.