I am converting a 67 cougar from c4 to tko, I have 4 wires at shifter of c4 2 red with black, and 2 red with blue. I know 2 need to be connected together for ignition and the other two are the back up lights. I need to know which is the back up lights etc.. I know someone out there has done this, please help, thanks. I'm in the middle of a major conversion, major for me anyway. 351w to 408 c4 to tko add power rack & pinion, 8" 279 to 9" 350/1 rear. Engine goes in tomorrow.Thanks for the info!!!