This is what i was looking at...
DRAG RACING 3-SPEED AUTOMATIC
Splitting the ratios (especially 2nd-over) is always valuable to the 3-speed car. 1st-over can be very valuable for hooking up with our AutoLaunch circuit on cars up to about 800hp but is a big torque multiplier and so cars with higher hp may break traction depending on their chassis setup. 2nd-over keeps the converter tight and produces torque multiplication right when the aerodynamics are starting to load the car heavily. We've never heard of a car that didn't run quicker going 1st, 2nd, 2nd-over then 3rd. A 1.28 deeper rear gear (the reciprocal of our ratio) can be used and the run 3rd-over for 5 to 6-speeds. With a 1.28 lower differential these cars can then also keep stock 1-2 ratio (instead of aftermarket deep gear) in the trans for less r.p.m. drop on shift.
Consistency and E.T. are improved by operating the engine and converter in a tighter rpm range as well as having more torque multipliers through the run. The
GEAR VENDORS is one of the few products that can improve both. Study the Final Drive Ratio charts in the 2-wheel drive section appropriate for your tranny make and also read the powerglide section.
Horsepower = Torque X RPM/5252 The Gear Vendors Under/Overdrive is one of the few products you can use to boost both sides of this equation. Keeping both the torque multiplication higher (gears are multipliers of torque) and the rpm tighter with the close ratios provide by gear-splitting. Your torque converter is also a torque multiplier. One of the benefits of gear-splitting is that all converters work better with the shortest steps in gearing. With the close ratios provide by the Gear Vendors there is also less need for high stall so you can concentrate on the 60ft and the overdrive will handle all the big end of the track.