"Mack" Trucks - Model Railroader Magazine

The Model R mack truck (tractor) was offered by Walthers in the mid-1990s, except as a solid core resin kit. It was not very well detailed and kinda rough looking (IMO), plus you had to futz around with the windshield/windows to make them look transparent (well, shiny).
Edit: Well, I do see it in the 2004 catalog, (933-4011). It's open core nowadays (all windows open, and basic interior provided), so get your Krystal-Kleer out - not sure how well detailed the body is (hard to tell from the catalog picture). Note that this truck is NOT listed on the Walthers Website