I used to have a msd digital window switch, and on that one you had to select a mode for the rpms to read correctly. If i remember correctly is was mode 4 for my t/a when I pulled the tac signal off of pin 10 on the pcm. I sold that with my last kit and got a msd 8956 cheap for my new set up. This is the one that uses the rpm pills. It has no mode selection, so can i pull my tac signal from the pcm on my z06 or will it not read correctly, if so where if the correct location to pull a tac signal with this window switch?