Thanks for the advice. Ihaven´t noticed any black smoke, and I actually have replaced the module about a year ago, thinking that was the problem. I didn´t replace it with a stock one, but then again I didn´t replace it with a crappy Autozone one either. I bought a Bosch one, which I hoped was a good choice. It didn´t seem to make much difference either.
I have a friend who´s brother is an engineer at Ford (he does paint and finishes unfortunately) who got me a technical service bulletin which describes "bucking and jerking at highway speeds". The Ford explaination for this is water/ice/salt buildup in the VAF. They suggest rebuilding the VAF (kit=$235) or replacing it altogether (about a billion $). This weekend I tried just spraying the heck out of it with carb cleaner--and that might have worked some. I haven´t noticed any stalling (at least this morning). The real test will be the commute home in the heat of the afternoon.
I agree with you on those discount autoparts stores. I once went into a Schuck´s in Seattle looking to buy a high volume oil pump for my Brothers ´70 Mach I. The counter guy asked me for what motor, to which I replied "351 Cleveland".
He flipped through his performance parts catalog with a puzzled look for a few seconds, then asked, "...now that´s a Chevy motor right?"
I chuckled thinking he was joking, but he just stared at me humorlessly. I knew I was in trouble at that point.
Luckily, after clearing up the fact that Mustangs are indeed made by Ford and that 351´s are in fact Ford only motors, he found he was going to have to order the part. I took this as my cue to leave, and wound up ordering one from Summit, which I should have done to start with.
I will let you know how my afternoon commute turns out.