I have 3.73 gears with a 9.5 inch converter that flashes to 4800 RPMs in my 69 Dart, car weights 3425 with me in it. The 408 in the car has ported W2s 10.4 compression, single plane intake, 950 HP, small solid roller, small TTi headers.
I drive this car everywhere, round trip to Vegas, back and forth to work three times a week[24 mile round trip] and Hot Rod DragWeek in 2012.
The best pass with the car so far has been 11.11 at 121MPH in FULL street trim on pump gas.
The 3.73 gear hurts drag strip times, car goes though the traps at 5400 RPMs.
I have since switched to 4.56 gears for DragWeek this year but both of our drag strips have closed down so I have not ben able to test the new gears.
