^^^ I'd definitly go with SCT for tuning, try getting the Xcal 2, thats the one I got and Steeda out of Milton, ON tuned my car. I'd say if your going boost and trying to achieve 200whp definitly get the Zetec motor swapped in (this is my own opinion). If your going to go cams, try http://www.mcnewsautomotive.com for a custom Turbo Grind cam, this will perform the best if you go turbocharged. As for the A/F gauge look into a Wideband 02 Gauge, I know AEM makes one as well as Innovative. These gauges can be found at http://focus.c-f-m.com
Anyways good luck and feel free to ask questions!
~Matt
Anyways good luck and feel free to ask questions!
~Matt