Vehicle Speed Sensor effect on tuning

pishta said
Do I require a Crank position sensor on an LA? What does it do as I got a TBI distributor.

Disregart\d, looked at schematic and I dont even see CPS on an 89, maybe for MPFI.

I know you didn't ask, but in my opinion the Chrysler TBI system is a downgrade from a well tuned carb. They had a plethora of reliability and drive ability issues... I'd spend my time on the magnum system any day