On the subject of tuning Fords. I spoke to several performance chip vendors when I had my Pursuit 250. None of them had a tune that would gain much more than 10 or 20 KW. Not real good bang for buck so I left it stock. This also made me think there wasn't a lot left in the standard 347 motor. To make any significant gains you would need a set of good heads and a change of cam.
I built a Wideband O2 sensor setup. The company Tech Edge offer theit 2A0 wideband O2 in kit form so I bought one and put it together. I do a bit of surface mount soldering with my work so I'm fairly handy with a soldering iron. I also built the LED display unit so that you can see your readings on the dash.
It seems to work OK but I've got to weld a couple of extra O2 bungs in my side pipes to test it properly.
Check them out:
Tech Edge
Cheers