Major differences between IH halftracks versus Diamond T, White and Autocar:
dashboard
jerry can racks higher
front fenders
different headlights
most panels welded, not bolted or screws
larger battery box
larger front tires
armored windshield and door armor panels have shutters on inside face
windscreen pillars larger/wider
rounded rear cab corners
rear bumper stops
bullet splash on hood in different location
many other small details’ differences