Im pretty sure its 1/24 . I dont think they did it in 1/18 scale :cheers
I have seen the 1:24 set but never the 1:18 version. Man I would love to get my hands on those!
Are you sure it was a 1/18? :confused To date no one has made a 1500, just a 2500 and those were long-wheel-base of that body style. Ertl is about to re-release the Anson mold Dakota in that paint scheme, maybe that is what you saw?