New LS1 Owners - Newbie Tech - Tach question

Im sure this has been asked before. Im installing an autometer playback tach in a 98 camaro z28. I was told buy a budy that the wire for the tach signal is coming out of the ecu and easiest to catch right there. he aslo told me the wires are differnt colors that you tap into for different years. he has a 2000.

Does anyone here know which wire i catch to wire the tach on a 98?

thanks

tony

www.ls2.com/boggs/torques/98pinpcm.htm

good stuff! thanks man!