I did a thread on installing a wideband O2 sensor.
O2 Sensor Install
Last fall I bought the Innovate MTX-L wideband and love it. I am not installing it in my dash, just using it as a tool. I then will put the plug in the bung. I installed the O2 and did some tuning last fall just as it was getting cold here in Utah, so I will finish it this month.
I'm an old guy and have worked on most carbs in the 60s and 70s. The wideband is wonderful. No more reading plugs and guessing. With the one I have I can hook it to a laptop and see the AF graph as you drive or just watch the gauge. You can watch each circuit; idle, transfer, main metering, power, accelerator pump, and secondaries on the graph. Just pay attention to how you are operating the throttle. You can record I believe about 50 minutes of running and save the file, then make your changes and run it again. Then compare to the previous file.
I found that recommended jet changes for altitude by the carb manufacturer was way off. With the second jet change I am running from 14.5-15 for main metering. I still have a lot of playing to do. This is one of the funnest tools I have ever bought.