After much anticipation, I finally got this thing, and it looks friggin cool. It came with a nice Bosch wideband O2 sensor and a bunch of hookups. It reads tach, AFR, and throttle position, and stores up to 5 mins of data, and can hook up to a laptop.

So my plan is this... Tune with the safc according to the BS3 for very lean conditions at cruise (im cheap ) and do 13.1-13.2 under heavy load, or whatever the butt dyno whispers in my ear.

This is on a '90 GXL with only exhaust and intake. Depending on what happens, we'll see where I go from there!