To hook this guage up can I just splice into the oxygen sensor wire, or do I nead a new oxygen sensor just for the guage?

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1989 Iroc-Z TPI 350 auto 4-spd Removed MAF screens K & N filters, stock other than that.

 

You can slice into the )2 sensor wire. Tap into it where it goes into the ECM..save you routing another wire through the firewall.

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"American made baby. 100% American iron. The muscle among the masses. My hero. Yep, you can take your ergonomically designed, space age, computer controlled, 4 door, cup holding map lighted split double wishbone split fold down retractable cargo covered moon roof piece of transportation and keep it. For I have felt the thunder. And I know the difference!"
JSP Motorsports
ICON Motorsports

 

I was snooping around autometer's web site and found some pretty helpful info. Thanks for the help anyway.