[SSsssteamer]

I have had Columbia overdrives in my 1936 4 dr sedan, in my 1936 panel delivery, and also in my 1947 Sportsman. All were stock engines for their years. I used 3.78 rear axle gears in all of them and I was very happy with all of them. Unless you live in a flat area, 3.54 gearing wouldn't see much Columbia overdrive use.