In talking to Arnie Beswick many times about racing in the "old days" he mentioned that the 3 speed manuals were stronger and more reliable than the 4 speeds of the day. So I assume he was talking about the Dearborn HD 3-speed VS the BW 1st generation T10 4-speed. Also fewer gear changes with the correct rear gearing could be quicker as well. Aluminum case Muncies, while light and super easy to repair, are not up to the kind of power we can easily make today and the sticky street tires we have either. They were borderline in the 60's with around 400 HP 450 lbs. of torque and the rock hard street tires of the time.
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