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the car is quite responsive, and I like the feel on the throttle. That being said I think I would have been happier with the 355 gears for the gas mileage. I drive mine on the interstate frequently and the lower rpm's would have been more to my taste than the launch from a stop light. 

 

So depending on what you want from your car you may or may not like the 373's and locker. OBTW I went with the Auburn because it was the only unit that wasnt on backorder at the time. But it has been solid and quiet since installation. 

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as cbolt said lite to lite they are good. highway not so good. 355 or 342 good street/ cruising gears. i have 411 and just put in gear vendor overdrive knocks it down to 320 when engauged 

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I just pulled out my 3.73 gears from my 71 SS 12-bolt rear and installed 3.07. The 3.73s were fun around town but I do a fair amount of highway driving and wasn't much fun at high RPM. I'm happier now. If I lived in the city and didn't do much highway driving then I would have likely kept the 3.73s.

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I guess I should have mentioned that I changed to the 373 gears when I installed my overdrive trans so the highway mileage isn't terrible, but it isn't where I want to be either, especially nowadays. 

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