What does yours idle with the b-cam. I have been dealing with everything you are talking about on my 94 GT with aluminum heads, comp cam, and gt40 ported upper and lower manifold. I have set the idle by several different means from the forums and can not get it any lower than 950-1000 rpms. I can get a good idle but when I plug the idle control back up the computer kicks it up. The 94-95 has a different computer than the Fox body Mustangs and has what is called a dashpot. It is designed to have a short hanging rpm between shifts and to hold the rpms at 1200 or so when coming to a complete stop. I have read where some tuners can go in with a soldering iron and fix the problem we are having. My last attempt was to use the "band-aid" fix. I used the IAC gasket as a templet and fabbed one out of thin aluminum but instead of the two large holes I made one of them about 9/32''. It helped as much as anything I did. It starts good, still idles at 1000 rpm but doesn't buck or surge. Shifting rpm falls quickly but still holds at 1200-1300 rpm's at a red light for 3-4 seconds. This is the best I have got it to do in the last 3-4 months. I have tried to set the idle at least 6 times using all sorts of advice off the forums, this one, Corral and others. This computer is killing us.