which gear ratio for 1/4 mile

Hi 440outlawdart,

I really find it difficult to believe that your peak rpm is so high. A fellow member recommended 5700-5800 RPM and I agree. I believe this should be your tarket for both shift points and running through the traps. A Hemi car has always been designed to sustain high rpm and the Hemis still have the best head design for flow ever made.

Even a completely stock 440-6pk power plant has 490 ft-lbs of torque right from the factory. Going from 4.56s to 4.30s, I doubt you'll see much difference since MPH and HP are closely related. The suggestion by another member about taking a second look at your converter is a wise thought too, might be too much slipage. Still, another member recommended knowing your HP and torque curves. If the power plant has not been dialed in on a dynamometer, I recommend you do so for next year, it's worth the expense. Then you'll know exactly what RPM to shift at and what your RPM through the traps should be. I wonder whether your carburator CFM is the best choice for your torque curve too.

Hope you reach your goal and best of luck.

T.O.