Although I've not had my wideband installed yet, plugs looked decent, manners and driveability were great.
I took out of box, jetted 2 settings down on primary side, 1 step down on secondary side, to account for my 3200ft elevation. I took great care to ensure throttle positions were identical, and used a carb synch device to ensure idle vacuum was same through both.
With minimal testing, I took car for long road trip to a car show, about 750 miles round trip. Car ran great, and averaged 15.8MPG imperial. Driveability and street manners were better than single 4bbl on single plane.
I have a little playing yet to do for full throttle, but it isn't bad.
