If you are useing a shift light with your DELTEQ, where are you hooking up the shift light for its signal. I have a MSD shift light, and it seems to use the coils negative side on non standard ignitions. So, would hooking up to one of the coils using there , DELTEQs manual, work?
http://www.delteq.com/Rev5c_Vette.pdf page 15 fig 9.

 

ttt

 

in that figure, use the wire that says to tach, near "see note 2" and "see note 3"


or you can tap into the tach signal from the PCM

 

Thanks