wish I could tell you for sure....just know that Ford did this during the 60's with the automatic equipped cars....I never would have dreamed there was even a difference between driveshafts on auto or stick shift cars.
Sure explains why so many of these cars have drivetrain vibrations now though.
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66 GT Fastback,fuel injected 5.0, 5-speed, cable clutch, JBA's and duals, 3.40 gears and handling mods...just call me "Doc"
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