This tool is really more useful for someone with an OBD-II car, because it records OBD-II natively and incorporates the wideband readings as well.
It's the single-channel kit, not the "basic":
http://innovatemotorsports.com/products/lm2.php
It's worked just fine on my car, and the OBD-II has worked on both my newer cars as well. I had some trouble getting it to work on Mike's car, but it may have just needed more tinkering. If you want to try it out before buying it to make sure it works for you, that would be fine.
I have everything that came with it, including the O2 bung and cap which are unused. The O2 sensor has been used about 5-6 times and is practically new. Also included is a USB SD card reader so you can load the results into your PC.
$300
