Ford says 83% effiiency or a 17% loss through the drivetrain for a 5 speed. At least that's what I've been told for a 5-speed driveline. I think that's about right though.
Rev
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'66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph
1/4 mi.
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