Trasnsgo makes a vacumm modulator kit to allow a non-computer install of a 4l60E. It works well I used one before I got the megasquirt GPIO transmission controller working.
The vacumm modulator controls the line pressure.
The shift pattern can be controoled using 2 toggle switches. The convertor lockup can be controlled using a vacumm switch typically used oin GM TH350 lockup trans.
