Thread: 1937 Plymouth 5 Window Coupe

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I wouldn't make a decision on gear selection unless I had a typical dyno readout for an engine with this cam, or some other info from the manufacturer that made me think that the engine either ran rough or had little power around 1800-2000 rpm.

Without that, the a typical rear end choice would be in the 3.0-3.5 range, particularly with small diameter rear tires.

It doesn't require much power to push a car at 60 mph. I geared mine for about 1600 at 60 mph and 2100 at 80. Both are higher than my Corvette would run at those cruising speeds. If I want high revs for quick acceleration, dropping down to third gives 2200 at 60 and around 3000 at 80.