1990's GMC Topkick Heavy Truck Cab by Perrys Resin.
Includes 1-piece Cab with separate grille, Interior tub with bench seat, 2 pc. dash & steering wheel, Front bumper, battery boxes & fuel tanks with step plates. Use with: AMT Fo-rd Louisville (or similar heavy truck donor).
You could use this cab for just about anything, from a Pepsi truck, to a dump truck, to a fire truck. The orange one below is a later model cab, but it's still very similar, and would make a good project.
Information and kit available at: Perrys Resin