Diamond T950C Heavy Truck by American Industrial Resin Kits.
Diamond-T 950 conversion kit includes cab, hood, fenders, bumper, aircleaner, complete interior, 2 fuel tank/steps, mirror heads, airhorn, door handles, running lights, cab window glass and exhaust stack. Grey parts are made of metal (pewter). This resin model / body would require a Heavy Truck model kit or a Light Truck model kit for donor parts to finish.
This product can be purchased at - aitruckmodels.com - if still available.