b&m shifter

Hook up the throttle position linkage, it adjust line pressure when you drive with auto valve bodies.

From Tom Hand at All-Par:
The governor works with the throttle pressure circuit to control shift points

the valve body can be considered the "Brain" of the transmission. It takes the hydraulic signals from the governor, throttle pressure rod, and manual shift valve, and combines these with fluid pressure from the oil pump to correctly time and control all transmission functions

The springs and valves work together to correctly modulate the fluid pressure to time application of the appropriate bands and clutches.

http://www.allpar.com/mopar/transmissions/torqueflite-tom-hand.html?ktrack=kcplink