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Seems like a steep gear for cruising....but nice for playing around.....don't know how the turbo 400 is geared....but with a wide ratio Muncie 4 speed ..that's a great gear ....don't yah think ??
 

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3.73 gears weren't offered by Pontiac for the GTO in '67. You could get 3.55's, 3.90's, or special order 4.33's. A 3.73 gear with a wide ratio Muncie would do just fine up until about 70 mph, where it would be revving like crazy. A great 'fun' gear for around-town-jaunts, not so much for road trips. I pulled the 3.36 out of my own '67 with a TH400 and swapped in a lazy 2.56 gear. Road trips are a lot of fun, now.
 
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