Quote Originally Posted by dave w View Post
The 1968 C10 has a Digital Dakota 8K VSS installed on the 3 speed transmission.

https://www.summitracing.com/parts/d...gaAsxEEALw_wcB

I didn't need to modify any DFCO setting. The 8K VSS requires a very ODD pulses per driveshaft revolution number. For the 1968 C10 the pulses per driveshaft revolution was about 3.25 to equal 8K pulses per mile.

Thanks dave,

I'm hoping to do this without a vss, so I'll keep poking around to figure out what settings need to be changed in the ECU.