I have a 90' Camaro 350 TBI, 5-speed. I am trying to install an Autometer 5'' tach. Which wire is the tach signal wire? It is a externally mounted coil. It looks like a HEI coil but is mounted on the intake. It has two connecting blocks that run to it, with two wires per block. A pink wire, and a white wire. One set of wires runs to the distributor and the others run somewhere else. I know what all the wires on the tach go to. If you can help id appreciate it!!!

HiDurationIroc 90' Iroc 350 TBI 5-speed with a badass cam

 

Tach wire should be the white wire.