Wideband o2 sensor

[grandprix34]

To properly tune the engine with what I plan, I wanted to get an 02 sensor that read everything, not like the one i have right now which is more for show than to actually tune...

What kind of 02 sensor would i need? Would a 4 wire sensor do or is it a special 02 sensor? ALso, saying I would get my hands on the 02 sensor, would I have to buy the special device that interprets the voltage signal or could I simply use the cheapy one I have for looks?(Air/Fuel Ratio Gauge)

[Dave]

... you'll need a wideband O2, check out http://www.aempower.com/product_ems.asp and look at their WEGO setup, it's the least expesnive (non diy setup) I've found anywhere.

[brian89gp]

What I said on w-body, plus http://www.wbo2.com/