Progress moves forward on the T75. Here is the engine - a 6 cylinder turbodiesel making roughly a lot of torque. The air filters are mounted inside the firewall of the cab - you can see the vent on the side where air comes in. There are some real semi trucks that are set up like this.
Next up: texture the cab, then model and texture the interior. Then the basic daycab T75 can be considered finished.