I just bought a Blitz SBC I-color and hooked it all up except for the Speed and Tach wires that are supposed to tap into the ecu wires.

Can anyone tell me which color wire to tap into for each application?

 

For Tach Go To Any Of The Coils Under The Engine Cover And Tie To Any Coil Wire That Is "not" White W/blue Stripe Or Black.for Speed Sense Go Behind Radio And Tie Into The White W/green Stripe Wire Coming From The Stock Radio Harness.the White/green Wire Controls The Scv For The Factory Radio.