3.91s in my 340 now!

Rude72* said

Hello Wvbuzzmaster:

Thank you for the response! Yes, I am completely satisfied with the 3.91s! Great torque and the car has been awakened!

You mentioned 3500-4000 rpm on the highway. On a relatively flat surface, what does your car pull (rpm-wise) at 60 mph? Just curious. I'm not exactly sure my exact mph now, since the gears were changed. I need to get the speedo recalibrated. Do you know how to do that? I have a friend that's great with muscle cars, I guess I can ask him. Not sure how much labor that involves.

Again... out of curiosity, what color is your 340?

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Rude72,
My Duster should be turning around 3200 RPM on flat ground at 60 with the 27” tall tire. Non lock up converter adds a couple hundred RPM from if it were a manual. But note I am usually turning over 3500 RPM on highway which is 70 MPH, which I find quite acceptable.

Speedometer is calibrated based off of axle gear and tire diameter, plus this fancy chart from Brewer. Then you add the correct number/color speedo gear in the tail shaft housing on your transmission, pretty simple.

Your next question of what color my 340 is might or might not be correct for year of car, but my non original 1969 340 is orange in my 1972 Duster.