Had a similar odd option on a 79 4x4 ramcharger se back in 79. Had the "Prospector" package, which was not explained on the window sticker either.
I've seen several Prospectors over the years, but I don't recall ever seeing a Ramcharger with that package. Interesting.
I have a 79 RC Prospector that I bought from the original owner (even got the down payment rect from the dealer). Best I can tell is that the prospector package was the decals and the upper body (adventurer) molding.
Was built 318-2, 3 tree, pie plates, vinyl low backs, am radio, silver dash face, no door inserts, no tail light trim, quad head lights. Has generic "custom" badge on dash, no pkg code on under hood sticker.
