Ford took one highly successful, well designed, mechanically simple tank already in mass production and tried to improve on it with a total redesign.
Soviet T-60 (1941)
WW2 French Light Tank Prototypes Archives - Tank Encyclopedia
Ford 3-man Light Tank - Tank Encyclopedia
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M48 Patton - Wikipedia
M60 tank - Wikipedia
Medium/Heavy Tank M26 Pershing - Tank Encyclopedia
Panzerkampfwagen I Ausf.A (Sd.Kfz.101) - Tank Encyclopedia
Ford 3-man Light Tank - Tank Encyclopedia
Soviet cruiser tank BT-5 (1933)
The Panzerkampfwagen III main battle tank (1937)
German What-if armour (1942-1946)
WW2 French Light Tanks Archives - Tank Encyclopedia
WW2 French Char de Bataille Archives - Tank Encyclopedia
Ford 3-ton Tank